{
  "schema_version": "1.3",
  "url": "https://trustbutveri.fyi/explorer/?mechanisms=M-0022,M-0012,M-0024&hide=weights,training",
  "data_generated": "2026-10-09",
  "definitions": {
    "methodology": "https://trustbutveri.fyi/about/methodology/",
    "readiness": "https://trustbutveri.fyi/about/readiness/",
    "filters": [
      {
        "id": "prover",
        "label": "Prover",
        "question": "How far can the party being checked be trusted?",
        "options": [
          {
            "value": "cooperative",
            "label": "Cooperative"
          },
          {
            "value": "semi-trusted",
            "label": "Semi-trusted"
          },
          {
            "value": "adversarial",
            "label": "Adversarial"
          }
        ],
        "rule": "Keeps mechanisms whose threat model holds against at least this prover. Adversarial is the strongest assumption.",
        "about": "The prover is the party being checked. Semi-trusted designs rely on part of its stack: usually the chip vendor's hardware root of trust, its firmware or counters, or its supply-chain records. Adversarial designs aim to hold even if it cheats wherever the checks allow, within their stated assumptions."
      },
      {
        "id": "onsite",
        "label": "Verifier devices on site",
        "question": "May the verifier install its own hardware at the prover's sites?",
        "options": [
          {
            "value": "no",
            "label": "Not allowed"
          }
        ],
        "rule": "\"Not allowed\" removes mechanisms that need a retrofit device, such as a network tap or a sealed sensor.",
        "about": "Some mechanisms need a device the verifier owns or trusts at the prover's facility, such as a network tap, a bandwidth limiter or a sealed sensor. Choose Not allowed when the setting rules that out. Inspectors are not covered."
      },
      {
        "id": "coop",
        "label": "Prover cooperation",
        "question": "How much must the prover take part?",
        "options": [
          {
            "value": "partial",
            "label": "Partial at most"
          },
          {
            "value": "none",
            "label": "Not required"
          }
        ],
        "rule": "\"Partial at most\" removes mechanisms that need the prover's active participation. \"Not required\" keeps only those that work without it.",
        "about": "Required: the prover takes part, for example by logging requests, producing proofs or opening records. Partial: some access, such as installing a device. Not required: works from outside, such as satellite imagery."
      },
      {
        "id": "chips",
        "label": "Chips",
        "question": "May the proposal depend on new chip designs?",
        "options": [
          {
            "value": "existing",
            "label": "Existing chips only"
          }
        ],
        "rule": "\"Existing chips only\" removes mechanisms that need changes to future chip designs.",
        "about": "New chip features take years to reach a deployed fleet and cover only chips made after they ship. Mechanisms that use shipping features, such as trusted execution environments or performance counters, stay."
      },
      {
        "id": "ready",
        "label": "Minimum development status",
        "question": "Development status",
        "options": [
          {
            "value": "R1",
            "label": "Proposed"
          },
          {
            "value": "R2",
            "label": "Research demonstration"
          },
          {
            "value": "R3",
            "label": "Operational use"
          },
          {
            "value": "R4",
            "label": "Legacy independent-evaluation filter",
            "legacy": true
          }
        ],
        "rule": "Keeps mechanisms whose readiness level is at least this one.",
        "about": "A level describes the public evidence for a mechanism's stated use, not its cost or feasibility. R3 can still have open critical flaws."
      },
      {
        "id": "tested",
        "label": "Attack testing",
        "question": "How hard has each mechanism been attacked in public?",
        "options": [
          {
            "value": "analysis",
            "label": "Published analysis"
          },
          {
            "value": "red-teamed",
            "label": "Red-teamed"
          },
          {
            "value": "independent-red-team",
            "label": "Independent red-team"
          }
        ],
        "rule": "Keeps mechanisms whose strongest published attack testing is at least this.",
        "about": "The strongest published attempt to break the mechanism for its verification use: a security analysis, red-teaming by its developers or collaborators, or a red team independent of them."
      },
      {
        "id": "hide",
        "label": "Keep hidden from the verifier",
        "question": "What must the verifier never see?",
        "options": [
          {
            "value": "weights",
            "label": "Model weights"
          },
          {
            "value": "io",
            "label": "Inputs and outputs"
          },
          {
            "value": "training",
            "label": "Training data"
          }
        ],
        "rule": "Removes mechanisms that show the asset to the verifier. Conditional or unspecified exposure stays with a note and needs checking against the privacy requirement.",
        "about": "Model weights: the checked model's parameters. Inputs and outputs: the requests a deployed model serves and its responses. Training data: what a model was trained on. Each mechanism's exposure is the editors' reading of its record: shown, depends on the design (kept, with a note), hidden, not involved, or unspecified for a selected implementation. Code and configuration are not covered yet."
      }
    ],
    "exposure": "For model weights, inputs and outputs, and training data. This is the editors' reading of each mechanism's record (its threat model, how it works and its limitations), not a field of the record. Shown: the verifier sees it. Depends: on the design or variant, or the verifier sees only samples. Hidden: the verifier sees only commitments, hashes, proofs or results. Not involved: the record does not handle it. Unspecified: the selected implementation has no asset-specific assessment here.",
    "claim_status": {
      "addressed": "A mechanism in the proposal is aimed at this claim and is not excluded by the filters.",
      "partly-addressed": "Only supporting mechanisms, or mechanisms aimed at it that the filters exclude.",
      "unaddressed": "No mechanism in the proposal addresses this claim."
    },
    "finding_classification": {
      "failure": {
        "label": "Known failures",
        "singular": "Known failure",
        "anchor": "known-flaws"
      },
      "scope-limitation": {
        "label": "Scope limitations",
        "singular": "Scope limitation",
        "anchor": "scope-limitations"
      },
      "open-question": {
        "label": "Open questions",
        "singular": "Open question",
        "anchor": "open-questions"
      }
    },
    "finding_scope": "Evidence scope describes where a finding was demonstrated; it does not establish applicability to every implementation in the mechanism family.",
    "claim_finding_scope": "open_critical_findings names active failures on the assessed records; open_critical_context names conditional family failures whose implementation applicability is unassessed.",
    "legacy_status": "The status field retains covered/partial/none for compatibility. It names claim links, never successful verification. Use claim_status and status_label for presentation."
  },
  "filters": {
    "prover": "",
    "onsite": "",
    "coop": "",
    "chips": "",
    "ready": "",
    "tested": "",
    "hide": [
      "weights",
      "training"
    ]
  },
  "mechanisms_passing_filters": 24,
  "claims": [],
  "mechanisms": [
    {
      "id": "M-0022",
      "title": "Side-channel suppression for isolated facilities",
      "url": "https://trustbutveri.fyi/mechanisms/side-channel-suppression/",
      "assessment_record": {
        "id": "M-0022",
        "title": "Side-channel suppression for isolated facilities",
        "url": "https://trustbutveri.fyi/mechanisms/side-channel-suppression/"
      },
      "finding_counts": {
        "failure": 0,
        "scope_limitation": 1,
        "open_question": 2,
        "open_failures": {
          "critical": 0,
          "significant": 0,
          "minor": 0
        }
      },
      "selected_implementation": null,
      "readiness": {
        "level": "R1",
        "scope": "bounding physical covert channels out of a verified enclosure",
        "confidence": "medium",
        "evidence": [
          "S-0038"
        ]
      },
      "development_status": {
        "code": "R1",
        "label": "Proposed",
        "short": "Proposed",
        "rank": 1,
        "legacy_code": "R1"
      },
      "security_evidence": {
        "attack_testing": {
          "status": "analysis",
          "label": "Published security analysis",
          "kind": "analysis"
        },
        "independent_evaluation": {
          "status": "unassessed"
        },
        "formal_proof": {
          "status": "unassessed"
        },
        "deployment_assurance": {
          "status": "unassessed"
        },
        "legacy_evaluation_code": null,
        "scoped_findings": [],
        "open_failures": {
          "critical": 0,
          "significant": 0,
          "minor": 0
        }
      },
      "assessed_properties": {
        "threat_model": "adversarial",
        "hardware_requirement": "retrofit-device",
        "prover_cooperation": "partial",
        "adversarial_evaluation": "analysis"
      },
      "claims": [],
      "exposure": {
        "weights": "none",
        "io": "none",
        "training": "none",
        "note": "Shields and filters a facility; it does not handle model data."
      },
      "family_finding_context": [],
      "filter_issues": []
    },
    {
      "id": "M-0012",
      "title": "Hardware-attested weight binding",
      "url": "https://trustbutveri.fyi/mechanisms/model-identity-attestation/",
      "assessment_record": {
        "id": "M-0012",
        "title": "Hardware-attested weight binding",
        "url": "https://trustbutveri.fyi/mechanisms/model-identity-attestation/"
      },
      "finding_counts": {
        "failure": 2,
        "scope_limitation": 1,
        "open_question": 0,
        "open_failures": {
          "critical": 1,
          "significant": 0,
          "minor": 0
        }
      },
      "selected_implementation": null,
      "readiness": {
        "level": "R3",
        "scope": "hardware-attested weight binding showing users that a service runs its committed weights",
        "confidence": "medium",
        "evidence": [
          "S-0013",
          "S-0012",
          "S-1206",
          "S-1207",
          "S-1208",
          "S-1209",
          "S-1202"
        ]
      },
      "development_status": {
        "code": "R3",
        "label": "Operational use",
        "short": "Operational use",
        "rank": 3,
        "legacy_code": "R3"
      },
      "security_evidence": {
        "attack_testing": {
          "status": "independent-red-team",
          "label": "Published attack testing",
          "kind": "practical",
          "attribution": "Independent team"
        },
        "independent_evaluation": {
          "status": "unassessed"
        },
        "formal_proof": {
          "status": "unassessed"
        },
        "deployment_assurance": {
          "status": "unassessed"
        },
        "legacy_evaluation_code": null,
        "scoped_findings": [
          {
            "n": 1,
            "severity": "critical",
            "status": "open",
            "evidence_scope": "inherited",
            "sources": [
              "S-1202",
              "S-1210",
              "S-1212",
              "S-1213",
              "S-1206",
              "S-0012"
            ],
            "related_finding": {
              "record": "M-0008",
              "flaw": 1
            }
          },
          {
            "n": 2,
            "severity": "significant",
            "status": "mitigated",
            "evidence_scope": "unassessed",
            "sources": [
              "S-0013",
              "S-0014"
            ]
          }
        ],
        "open_failures": {
          "critical": 1,
          "significant": 0,
          "minor": 0
        }
      },
      "assessed_properties": {
        "threat_model": "semi-trusted",
        "hardware_requirement": "existing-features",
        "prover_cooperation": "required",
        "adversarial_evaluation": "independent-red-team"
      },
      "claims": [],
      "exposure": {
        "weights": "hidden",
        "io": "unknown",
        "training": "none",
        "note": "Verifiers check a hash commitment to the weights, carried in a hardware attestation, and need no access to the weights themselves. The mechanism does not specify whether prompts and outputs are disclosed to a verifier. It involves no training data.",
        "sources": [
          "S-0013",
          "S-0012",
          "S-0009"
        ]
      },
      "family_finding_context": [],
      "filter_issues": []
    },
    {
      "id": "M-0024",
      "title": "Bounding unexplained information in outputs",
      "url": "https://trustbutveri.fyi/mechanisms/bounding-unexplained-information/",
      "assessment_record": {
        "id": "M-0024",
        "title": "Bounding unexplained information in outputs",
        "url": "https://trustbutveri.fyi/mechanisms/bounding-unexplained-information/"
      },
      "finding_counts": {
        "failure": 1,
        "scope_limitation": 2,
        "open_question": 1,
        "open_failures": {
          "critical": 0,
          "significant": 1,
          "minor": 0
        }
      },
      "selected_implementation": null,
      "readiness": {
        "level": "R2",
        "scope": "bounding how much hidden information can leave in checked inference outputs",
        "confidence": "low",
        "evidence": [
          "S-0019",
          "S-0015",
          "S-1507"
        ]
      },
      "development_status": {
        "code": "R2",
        "label": "Research demonstration",
        "short": "Research demo",
        "rank": 2,
        "legacy_code": "R2"
      },
      "security_evidence": {
        "attack_testing": {
          "status": "independent-red-team",
          "label": "Published attack testing",
          "kind": "practical",
          "attribution": "Independent team"
        },
        "independent_evaluation": {
          "status": "unassessed"
        },
        "formal_proof": {
          "status": "unassessed"
        },
        "deployment_assurance": {
          "status": "unassessed"
        },
        "legacy_evaluation_code": null,
        "scoped_findings": [
          {
            "n": 1,
            "severity": "significant",
            "status": "open",
            "evidence_scope": "unassessed",
            "sources": [
              "S-1507",
              "S-0015"
            ]
          }
        ],
        "open_failures": {
          "critical": 0,
          "significant": 1,
          "minor": 0
        }
      },
      "assessed_properties": {
        "threat_model": "adversarial",
        "hardware_requirement": "retrofit-device",
        "prover_cooperation": "required",
        "adversarial_evaluation": "independent-red-team"
      },
      "claims": [],
      "exposure": {
        "weights": "partial",
        "io": "partial",
        "training": "none",
        "note": "Depends on where recomputation runs: in a sealed enclosure, or with zero-knowledge proofs, the verifier need not see the weights or the traffic."
      },
      "family_finding_context": [],
      "filter_issues": [
        {
          "filter": "hide",
          "level": "note",
          "short": "may show model weights",
          "text": "May show model weights, depending on the design. Depends on where recomputation runs: in a sealed enclosure, or with zero-knowledge proofs, the verifier need not see the weights or the traffic."
        }
      ]
    }
  ],
  "strengths": {
    "covered": [],
    "production": [
      "M-0012"
    ],
    "operationalUse": [
      "M-0012"
    ],
    "adversarial": [
      "M-0022",
      "M-0024"
    ],
    "noNewHardware": [
      "M-0012"
    ],
    "mitigated": [
      {
        "mech": "M-0012",
        "n": 2,
        "historical": false,
        "title": "Launch-state attestation does not by itself cover weights loaded later",
        "classification": "failure",
        "kind": "theoretical-argument",
        "severity": "significant",
        "status": "mitigated",
        "evidence_scope": null,
        "scope_note": null,
        "related_finding": null,
        "description": "Attestation measures launch state, and weights are read from disk after boot. A signature checked at load time does not stop a malicious hypervisor from altering the disk afterwards. Tinfoil reports mitigating this with dm-verity checks on every read. Unmeasured runtime configuration remains a general risk.",
        "response": null,
        "sources": [
          "S-0013",
          "S-0014"
        ]
      }
    ],
    "notCounted": []
  },
  "properties": {
    "covered": [],
    "production": [
      "M-0012"
    ],
    "operationalUse": [
      "M-0012"
    ],
    "adversarial": [
      "M-0022",
      "M-0024"
    ],
    "noNewHardware": [
      "M-0012"
    ],
    "mitigated": [
      {
        "mech": "M-0012",
        "n": 2,
        "historical": false,
        "title": "Launch-state attestation does not by itself cover weights loaded later",
        "classification": "failure",
        "kind": "theoretical-argument",
        "severity": "significant",
        "status": "mitigated",
        "evidence_scope": null,
        "scope_note": null,
        "related_finding": null,
        "description": "Attestation measures launch state, and weights are read from disk after boot. A signature checked at load time does not stop a malicious hypervisor from altering the disk afterwards. Tinfoil reports mitigating this with dm-verity checks on every read. Unmeasured runtime configuration remains a general risk.",
        "response": null,
        "sources": [
          "S-0013",
          "S-0014"
        ]
      }
    ],
    "notCounted": []
  },
  "attack_testing": [
    {
      "id": "M-0022",
      "record": "M-0022",
      "evaluation": "analysis",
      "in_setting": true
    },
    {
      "id": "M-0012",
      "record": "M-0012",
      "evaluation": "independent-red-team",
      "in_setting": true
    },
    {
      "id": "M-0024",
      "record": "M-0024",
      "evaluation": "independent-red-team",
      "in_setting": true
    }
  ],
  "selected_implementations": {},
  "weaknesses": {
    "gaps": [],
    "excluded": [],
    "unlinked": [],
    "critical": [
      {
        "mech": "M-0012",
        "n": 1,
        "historical": false,
        "title": "Underlying attestation can be forged or relayed",
        "classification": "failure",
        "kind": "demonstrated-attack",
        "severity": "critical",
        "status": "open",
        "evidence_scope": "inherited",
        "scope_note": "Critical for weight binding against an operator with physical access to affected hardware, or with control of the hypervisor on an AMD SEV-SNP platform without AMD's fixes. PAL*M excludes physical attacks, and Tinfoil acknowledges this boundary.",
        "related_finding": {
          "record": "M-0008",
          "flaw": 1
        },
        "description": "The enclave route inherits the platform-specific TEE attestation failures. Intel TDX forgery and H100 relay were demonstrated with physical access and host control. Battering RAM defeated AMD SEV-SNP attestation on DDR4 servers; RMPocalypse did so from malicious host software on platforms without AMD's fixes. These demonstrate failures of the trust roots, not of each model-commitment protocol.",
        "response": "The TEE.fail authors report that physical interposer attacks are outside Intel's and AMD's threat models. AMD reports fixes for RMPocalypse.",
        "sources": [
          "S-1202",
          "S-1210",
          "S-1212",
          "S-1213",
          "S-1206",
          "S-0012"
        ],
        "helps": [
          {
            "by": "M-0009",
            "how": "A tamper-protected enclosure around the chip is the proposed answer when the party that holds the hardware may attack it physically."
          }
        ]
      }
    ],
    "significant": [
      {
        "mech": "M-0024",
        "n": 1,
        "historical": false,
        "title": "Prompt-controlled entropy inflation widens the covert channel",
        "classification": "failure",
        "kind": "demonstrated-attack",
        "severity": "significant",
        "status": "open",
        "evidence_scope": null,
        "scope_note": null,
        "related_finding": null,
        "description": "Gumbel-based inference verification tolerates token choices that honest GPU nondeterminism could produce, and the size of that tolerated set grows with the model's output entropy. Kezins, an independent researcher, showed that an adversary who controls the prompt distribution can raise output entropy and roughly double the bits leaked per token. Across six models of 1 to 32 billion parameters, this cut the slowdown from 146–254 times under benign prompts to 60–118 times. Kezins argues that architectures built on the same unexplained-information bound inherit this attack surface, and recommends calibrating tolerances against local token entropy rather than benign traffic.",
        "response": null,
        "sources": [
          "S-1507",
          "S-0015"
        ],
        "helps": [
          {
            "by": "M-0002",
            "how": "Bit-exact replay would remove the tolerance for numerical noise that sets the size of this channel. The record notes that it needs full hardware and software metadata."
          }
        ]
      }
    ],
    "criticalMechanisms": [
      "M-0012"
    ],
    "significantMechanisms": [
      "M-0024"
    ],
    "familyContext": [],
    "scopeLimitations": [
      {
        "mech": "M-0022",
        "n": 2,
        "historical": false,
        "title": "Openings for airflow, power and optics weaken shielding",
        "classification": "scope-limitation",
        "kind": "theoretical-argument",
        "severity": "significant",
        "status": "open",
        "evidence_scope": null,
        "scope_note": null,
        "related_finding": null,
        "description": "Cankaya notes that keeping attenuation high while passing high-power airflow, cabling and optical links adds complexity beyond existing shielded-enclosure specifications.",
        "response": null,
        "sources": [
          "S-0038"
        ]
      },
      {
        "mech": "M-0012",
        "n": 3,
        "historical": false,
        "title": "For private models, a user can confirm consistency but not content",
        "classification": "scope-limitation",
        "kind": "open-question",
        "severity": "significant",
        "status": "open",
        "evidence_scope": null,
        "scope_note": null,
        "related_finding": null,
        "description": "When weights are not published, users can check that the same root hash is served each time, but not what the model is. Pairing the hash with an attested evaluation, as in Attestable Audits, is one proposed remedy.",
        "response": null,
        "sources": [
          "S-0013",
          "S-0009"
        ]
      },
      {
        "mech": "M-0024",
        "n": 2,
        "historical": false,
        "title": "Information the declared computation explains is not bounded",
        "classification": "scope-limitation",
        "kind": "theoretical-argument",
        "severity": "significant",
        "status": "open",
        "evidence_scope": null,
        "scope_note": null,
        "related_finding": null,
        "description": "The bound limits unexplained bits only. Outputs that the declared computation fully explains can still carry valuable information: a compression study notes that an adversary with inference access can extract more proprietary information per bit than naive transmission allows.",
        "response": null,
        "sources": [
          "S-1508",
          "S-0019"
        ]
      },
      {
        "mech": "M-0024",
        "n": 3,
        "historical": false,
        "title": "Channels other than checked outputs are outside the bound",
        "classification": "scope-limitation",
        "kind": "theoretical-argument",
        "severity": "significant",
        "status": "open",
        "evidence_scope": null,
        "scope_note": null,
        "related_finding": null,
        "description": "The inference-verification scheme treats side channels as out of scope. A low-trust system design argues that suppressing physical covert bandwidth below kilobits per second is much more achievable than aiming for zero, and that a malicious device can leak one bit of information by deliberately outputting a wrong result.",
        "response": null,
        "sources": [
          "S-0015",
          "S-0018"
        ],
        "helps": [
          {
            "by": "M-0022",
            "how": "Physical side channels need separate suppression, which is this mechanism's purpose."
          }
        ]
      }
    ],
    "openQuestions": [
      {
        "mech": "M-0022",
        "n": 1,
        "historical": false,
        "title": "Supply-chain implants may evade inspection",
        "classification": "open-question",
        "kind": "theoretical-argument",
        "severity": "significant",
        "status": "open",
        "evidence_scope": null,
        "scope_note": null,
        "related_finding": null,
        "description": "Cankaya identifies malicious hardware embedded deep in purchased components as a residual risk that visual inspection and disassembly may not catch. He notes that radiographic examination under high-security standards could mitigate it.",
        "response": null,
        "sources": [
          "S-0038"
        ]
      },
      {
        "mech": "M-0022",
        "n": 3,
        "historical": false,
        "title": "Inspection assumptions may not hold",
        "classification": "open-question",
        "kind": "open-question",
        "severity": "significant",
        "status": "open",
        "evidence_scope": null,
        "scope_note": null,
        "related_finding": null,
        "description": "The design's statistical argument assumes that visual or disassembly inspection catches every flaw that is present in a sampled unit. Cankaya is unsure whether destructive teardowns are defence-dominant or offence-dominant.",
        "response": null,
        "sources": [
          "S-0038"
        ]
      },
      {
        "mech": "M-0024",
        "n": 4,
        "historical": false,
        "title": "The facility-level design is untested",
        "classification": "open-question",
        "kind": "open-question",
        "severity": "significant",
        "status": "open",
        "evidence_scope": null,
        "scope_note": null,
        "related_finding": null,
        "description": "The compute-verification architecture is described with protocol details, potential attacks and prototyping plans, but no prototype results have been published.",
        "response": null,
        "sources": [
          "S-0019"
        ]
      }
    ],
    "minor": 0,
    "minorFindings": [],
    "minorBy": [],
    "notDemonstrated": [
      "M-0022"
    ],
    "newChip": []
  },
  "findings": [
    {
      "mech": "M-0022",
      "record": "M-0022",
      "n": 1,
      "historical": false,
      "title": "Supply-chain implants may evade inspection",
      "classification": "open-question",
      "kind": "theoretical-argument",
      "severity": "significant",
      "status": "open",
      "evidence_scope": null,
      "scope_note": null,
      "related_finding": null,
      "description": "Cankaya identifies malicious hardware embedded deep in purchased components as a residual risk that visual inspection and disassembly may not catch. He notes that radiographic examination under high-security standards could mitigate it.",
      "response": null,
      "sources": [
        "S-0038"
      ]
    },
    {
      "mech": "M-0022",
      "record": "M-0022",
      "n": 2,
      "historical": false,
      "title": "Openings for airflow, power and optics weaken shielding",
      "classification": "scope-limitation",
      "kind": "theoretical-argument",
      "severity": "significant",
      "status": "open",
      "evidence_scope": null,
      "scope_note": null,
      "related_finding": null,
      "description": "Cankaya notes that keeping attenuation high while passing high-power airflow, cabling and optical links adds complexity beyond existing shielded-enclosure specifications.",
      "response": null,
      "sources": [
        "S-0038"
      ]
    },
    {
      "mech": "M-0022",
      "record": "M-0022",
      "n": 3,
      "historical": false,
      "title": "Inspection assumptions may not hold",
      "classification": "open-question",
      "kind": "open-question",
      "severity": "significant",
      "status": "open",
      "evidence_scope": null,
      "scope_note": null,
      "related_finding": null,
      "description": "The design's statistical argument assumes that visual or disassembly inspection catches every flaw that is present in a sampled unit. Cankaya is unsure whether destructive teardowns are defence-dominant or offence-dominant.",
      "response": null,
      "sources": [
        "S-0038"
      ]
    },
    {
      "mech": "M-0012",
      "record": "M-0012",
      "n": 1,
      "historical": false,
      "title": "Underlying attestation can be forged or relayed",
      "classification": "failure",
      "kind": "demonstrated-attack",
      "severity": "critical",
      "status": "open",
      "evidence_scope": "inherited",
      "scope_note": "Critical for weight binding against an operator with physical access to affected hardware, or with control of the hypervisor on an AMD SEV-SNP platform without AMD's fixes. PAL*M excludes physical attacks, and Tinfoil acknowledges this boundary.",
      "related_finding": {
        "record": "M-0008",
        "flaw": 1
      },
      "description": "The enclave route inherits the platform-specific TEE attestation failures. Intel TDX forgery and H100 relay were demonstrated with physical access and host control. Battering RAM defeated AMD SEV-SNP attestation on DDR4 servers; RMPocalypse did so from malicious host software on platforms without AMD's fixes. These demonstrate failures of the trust roots, not of each model-commitment protocol.",
      "response": "The TEE.fail authors report that physical interposer attacks are outside Intel's and AMD's threat models. AMD reports fixes for RMPocalypse.",
      "sources": [
        "S-1202",
        "S-1210",
        "S-1212",
        "S-1213",
        "S-1206",
        "S-0012"
      ],
      "helps": [
        {
          "by": "M-0009",
          "how": "A tamper-protected enclosure around the chip is the proposed answer when the party that holds the hardware may attack it physically."
        }
      ]
    },
    {
      "mech": "M-0012",
      "record": "M-0012",
      "n": 2,
      "historical": false,
      "title": "Launch-state attestation does not by itself cover weights loaded later",
      "classification": "failure",
      "kind": "theoretical-argument",
      "severity": "significant",
      "status": "mitigated",
      "evidence_scope": null,
      "scope_note": null,
      "related_finding": null,
      "description": "Attestation measures launch state, and weights are read from disk after boot. A signature checked at load time does not stop a malicious hypervisor from altering the disk afterwards. Tinfoil reports mitigating this with dm-verity checks on every read. Unmeasured runtime configuration remains a general risk.",
      "response": null,
      "sources": [
        "S-0013",
        "S-0014"
      ]
    },
    {
      "mech": "M-0012",
      "record": "M-0012",
      "n": 3,
      "historical": false,
      "title": "For private models, a user can confirm consistency but not content",
      "classification": "scope-limitation",
      "kind": "open-question",
      "severity": "significant",
      "status": "open",
      "evidence_scope": null,
      "scope_note": null,
      "related_finding": null,
      "description": "When weights are not published, users can check that the same root hash is served each time, but not what the model is. Pairing the hash with an attested evaluation, as in Attestable Audits, is one proposed remedy.",
      "response": null,
      "sources": [
        "S-0013",
        "S-0009"
      ]
    },
    {
      "mech": "M-0024",
      "record": "M-0024",
      "n": 1,
      "historical": false,
      "title": "Prompt-controlled entropy inflation widens the covert channel",
      "classification": "failure",
      "kind": "demonstrated-attack",
      "severity": "significant",
      "status": "open",
      "evidence_scope": null,
      "scope_note": null,
      "related_finding": null,
      "description": "Gumbel-based inference verification tolerates token choices that honest GPU nondeterminism could produce, and the size of that tolerated set grows with the model's output entropy. Kezins, an independent researcher, showed that an adversary who controls the prompt distribution can raise output entropy and roughly double the bits leaked per token. Across six models of 1 to 32 billion parameters, this cut the slowdown from 146–254 times under benign prompts to 60–118 times. Kezins argues that architectures built on the same unexplained-information bound inherit this attack surface, and recommends calibrating tolerances against local token entropy rather than benign traffic.",
      "response": null,
      "sources": [
        "S-1507",
        "S-0015"
      ],
      "helps": [
        {
          "by": "M-0002",
          "how": "Bit-exact replay would remove the tolerance for numerical noise that sets the size of this channel. The record notes that it needs full hardware and software metadata."
        }
      ]
    },
    {
      "mech": "M-0024",
      "record": "M-0024",
      "n": 2,
      "historical": false,
      "title": "Information the declared computation explains is not bounded",
      "classification": "scope-limitation",
      "kind": "theoretical-argument",
      "severity": "significant",
      "status": "open",
      "evidence_scope": null,
      "scope_note": null,
      "related_finding": null,
      "description": "The bound limits unexplained bits only. Outputs that the declared computation fully explains can still carry valuable information: a compression study notes that an adversary with inference access can extract more proprietary information per bit than naive transmission allows.",
      "response": null,
      "sources": [
        "S-1508",
        "S-0019"
      ]
    },
    {
      "mech": "M-0024",
      "record": "M-0024",
      "n": 3,
      "historical": false,
      "title": "Channels other than checked outputs are outside the bound",
      "classification": "scope-limitation",
      "kind": "theoretical-argument",
      "severity": "significant",
      "status": "open",
      "evidence_scope": null,
      "scope_note": null,
      "related_finding": null,
      "description": "The inference-verification scheme treats side channels as out of scope. A low-trust system design argues that suppressing physical covert bandwidth below kilobits per second is much more achievable than aiming for zero, and that a malicious device can leak one bit of information by deliberately outputting a wrong result.",
      "response": null,
      "sources": [
        "S-0015",
        "S-0018"
      ],
      "helps": [
        {
          "by": "M-0022",
          "how": "Physical side channels need separate suppression, which is this mechanism's purpose."
        }
      ]
    },
    {
      "mech": "M-0024",
      "record": "M-0024",
      "n": 4,
      "historical": false,
      "title": "The facility-level design is untested",
      "classification": "open-question",
      "kind": "open-question",
      "severity": "significant",
      "status": "open",
      "evidence_scope": null,
      "scope_note": null,
      "related_finding": null,
      "description": "The compute-verification architecture is described with protocol details, potential attacks and prototyping plans, but no prototype results have been published.",
      "response": null,
      "sources": [
        "S-0019"
      ]
    }
  ],
  "possible_additions": [
    {
      "id": "M-0009",
      "title": "Hardware-enabled guarantees (flexHEG) and guarantee processors",
      "url": "https://trustbutveri.fyi/mechanisms/flexheg-guarantee-processors/",
      "readiness": "R1",
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        "code": "R1",
        "label": "Proposed",
        "short": "Proposed",
        "rank": 1,
        "legacy_code": "R1"
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        "scoped_findings": [
          {
            "n": 1,
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            "evidence_scope": "unassessed",
            "sources": [
              "S-1204",
              "S-0057"
            ]
          },
          {
            "n": 2,
            "severity": "significant",
            "status": "open",
            "evidence_scope": "unassessed",
            "sources": [
              "S-1204"
            ]
          },
          {
            "n": 4,
            "severity": "significant",
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            "evidence_scope": "unassessed",
            "sources": [
              "S-1204"
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          }
        ],
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      },
      "fits_filters": true,
      "filter_issues": [],
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          "how": "A tamper-protected enclosure around the chip is the proposed answer when the party that holds the hardware may attack it physically."
        }
      ]
    },
    {
      "id": "M-0002",
      "title": "Deterministic and bit-exact inference",
      "url": "https://trustbutveri.fyi/mechanisms/deterministic-inference/",
      "readiness": "R3",
      "development_status": {
        "code": "R3",
        "label": "Operational use",
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        "legacy_code": "R3"
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        }
      },
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          "title": "Prompt-controlled entropy inflation widens the covert channel",
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          "how": "Bit-exact replay would remove the tolerance for numerical noise that sets the size of this channel. The record notes that it needs full hardware and software metadata."
        },
        {
          "kind": "blocker",
          "mech": "M-0024",
          "text": "Tolerance for numerical nondeterminism sets the size of the residual channel; bit-exact replay would remove it but needs full hardware and software metadata."
        }
      ]
    },
    {
      "id": "M-0008",
      "title": "TEE remote attestation for AI workloads",
      "url": "https://trustbutveri.fyi/mechanisms/tee-remote-attestation/",
      "readiness": "R3",
      "development_status": {
        "code": "R3",
        "label": "Operational use",
        "short": "Operational use",
        "rank": 3,
        "legacy_code": "R3"
      },
      "security_evidence": {
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          "attribution": "Independent team"
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          "status": "unassessed"
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        "formal_proof": {
          "status": "unassessed"
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        "deployment_assurance": {
          "status": "unassessed"
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        "legacy_evaluation_code": null,
        "scoped_findings": [
          {
            "n": 1,
            "severity": "critical",
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            "sources": [
              "S-1202",
              "S-3126",
              "S-0012",
              "S-1206",
              "S-0014",
              "S-1210",
              "S-1212",
              "S-3127"
            ]
          },
          {
            "n": 2,
            "severity": "critical",
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              "S-1210",
              "S-1211"
            ]
          },
          {
            "n": 3,
            "severity": "critical",
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              "S-1212",
              "S-1213",
              "S-3127",
              "S-3128"
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          },
          {
            "n": 4,
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            "sources": [
              "S-1202"
            ]
          },
          {
            "n": 5,
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            "evidence_scope": "mechanism",
            "sources": [
              "S-0012",
              "S-0009",
              "S-0014",
              "S-3123",
              "S-3129"
            ]
          },
          {
            "n": 8,
            "severity": "significant",
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            "evidence_scope": "mechanism",
            "sources": [
              "S-0014",
              "S-0009",
              "S-3130",
              "S-3131"
            ]
          }
        ],
        "open_failures": {
          "critical": 2,
          "significant": 3,
          "minor": 0
        }
      },
      "fits_filters": true,
      "filter_issues": [],
      "reasons": [
        {
          "kind": "blocker",
          "mech": "M-0012",
          "text": "Attestation that resists physical attackers, for the enclave variant."
        }
      ]
    },
    {
      "id": "M-0014",
      "title": "Bandwidth limits and compartmentalization",
      "url": "https://trustbutveri.fyi/mechanisms/bandwidth-limits-and-compartmentalization/",
      "readiness": "R2",
      "development_status": {
        "code": "R2",
        "label": "Research demonstration",
        "short": "Research demo",
        "rank": 2,
        "legacy_code": "R2"
      },
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          "status": "analysis",
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        "formal_proof": {
          "status": "unassessed"
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        "deployment_assurance": {
          "status": "unassessed"
        },
        "legacy_evaluation_code": null,
        "scoped_findings": [
          {
            "n": 2,
            "severity": "significant",
            "status": "open",
            "evidence_scope": "unassessed",
            "sources": [
              "S-1301"
            ]
          },
          {
            "n": 5,
            "severity": "significant",
            "status": "open",
            "evidence_scope": "unassessed",
            "sources": [
              "S-1313"
            ]
          }
        ],
        "open_failures": {
          "critical": 0,
          "significant": 2,
          "minor": 0
        }
      },
      "fits_filters": true,
      "filter_issues": [],
      "reasons": [
        {
          "kind": "blocker",
          "mech": "M-0024",
          "text": "The prover's compute must be isolated so that all traffic passes through the verifier's interlock; any unmonitored path voids the bound."
        }
      ]
    },
    {
      "id": "M-0001",
      "title": "Sampled inference recomputation",
      "url": "https://trustbutveri.fyi/mechanisms/sampled-inference-recomputation/",
      "readiness": "R3",
      "development_status": {
        "code": "R3",
        "label": "Operational use",
        "short": "Operational use",
        "rank": 3,
        "legacy_code": "R3"
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          "status": "unassessed"
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        "legacy_evaluation_code": null,
        "scoped_findings": [
          {
            "n": 1,
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            "sources": [
              "S-0020",
              "S-0015",
              "S-1507"
            ]
          },
          {
            "n": 3,
            "severity": "significant",
            "status": "open",
            "evidence_scope": "unassessed",
            "sources": [
              "S-1000",
              "S-0016"
            ]
          },
          {
            "n": 4,
            "severity": "minor",
            "status": "open",
            "evidence_scope": "unassessed",
            "sources": [
              "S-0016"
            ]
          }
        ],
        "open_failures": {
          "critical": 0,
          "significant": 2,
          "minor": 1
        }
      },
      "fits_filters": true,
      "filter_issues": [],
      "reasons": [
        {
          "kind": "prerequisite",
          "mech": "M-0024"
        }
      ]
    },
    {
      "id": "M-0013",
      "title": "Network taps and certifiers",
      "url": "https://trustbutveri.fyi/mechanisms/network-taps-and-certifiers/",
      "readiness": "R1",
      "development_status": {
        "code": "R1",
        "label": "Proposed",
        "short": "Proposed",
        "rank": 1,
        "legacy_code": "R1"
      },
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          "status": "unassessed"
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        "scoped_findings": [
          {
            "n": 1,
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            "sources": [
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            ]
          },
          {
            "n": 4,
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            "sources": [
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            ]
          },
          {
            "n": 6,
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            "evidence_scope": "unassessed",
            "sources": [
              "S-1300"
            ]
          }
        ],
        "open_failures": {
          "critical": 0,
          "significant": 2,
          "minor": 0
        }
      },
      "fits_filters": true,
      "filter_issues": [],
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        {
          "kind": "prerequisite",
          "mech": "M-0024"
        }
      ]
    }
  ],
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      {
        "id": "M-0008",
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          "M-0012"
        ]
      },
      {
        "id": "M-0001",
        "neededBy": [
          "M-0024"
        ]
      },
      {
        "id": "M-0014",
        "neededBy": [
          "M-0024"
        ]
      },
      {
        "id": "M-0013",
        "neededBy": [
          "M-0024"
        ]
      }
    ],
    "shared": [],
    "blockers": [
      {
        "mech": "M-0022",
        "n": 1,
        "historical": false,
        "text": "No prototype or red-team exists; the design is a first-pass viability study.",
        "theme": "adversarial-validation",
        "blocked_by": null,
        "sources": [
          "S-0038"
        ],
        "inProposal": null
      },
      {
        "mech": "M-0022",
        "n": 2,
        "historical": false,
        "text": "Volume costs of TEMPEST-grade power-line filters are uncertain, because existing products are mostly made to order.",
        "theme": "performance-compatibility",
        "blocked_by": null,
        "sources": [
          "S-0038"
        ],
        "inProposal": null
      },
      {
        "mech": "M-0012",
        "n": 1,
        "historical": false,
        "text": "Attestation that resists physical attackers, for the enclave variant.",
        "theme": "hardware-trust",
        "blocked_by": "M-0008",
        "sources": [
          "S-1202"
        ],
        "inProposal": false
      },
      {
        "mech": "M-0024",
        "n": 1,
        "historical": false,
        "text": "The prover's compute must be isolated so that all traffic passes through the verifier's interlock; any unmonitored path voids the bound.",
        "theme": "coverage-hidden-compute",
        "blocked_by": "M-0014",
        "sources": [
          "S-0019"
        ],
        "inProposal": false
      },
      {
        "mech": "M-0024",
        "n": 2,
        "historical": false,
        "text": "Physical side channels need separate suppression, and one design treats a low residual bandwidth, rather than zero, as the realistic target.",
        "theme": "coverage-hidden-compute",
        "blocked_by": "M-0022",
        "sources": [
          "S-0018",
          "S-0015"
        ],
        "inProposal": true
      },
      {
        "mech": "M-0024",
        "n": 3,
        "historical": false,
        "text": "Tolerance for numerical nondeterminism sets the size of the residual channel; bit-exact replay would remove it but needs full hardware and software metadata.",
        "theme": "protocol-soundness",
        "blocked_by": "M-0002",
        "sources": [
          "S-1507",
          "S-0018"
        ],
        "inProposal": false
      },
      {
        "mech": "M-0024",
        "n": 4,
        "historical": false,
        "text": "Recomputation over confidential weights and inputs needs a protected setting: prover recomputation in a verifier-controlled enclosure, verifier recomputation in a prover-controlled enclosure, or zero-knowledge proofs.",
        "theme": "privacy-leakage",
        "blocked_by": null,
        "sources": [
          "S-0019"
        ],
        "inProposal": null
      },
      {
        "mech": "M-0024",
        "n": 5,
        "historical": false,
        "text": "No prototype of the facility-level architecture exists to red-team.",
        "theme": "adversarial-validation",
        "blocked_by": null,
        "sources": [
          "S-0019"
        ],
        "inProposal": null
      }
    ]
  },
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      "partial": [
        "M-0024"
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        "M-0022"
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      "unknown": []
    },
    "io": {
      "shown": [],
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    {
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      "path": "/sources/tinfoil-proving-model-identity/"
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      "path": "/sources/tinfoil-docs-attestation-architecture/"
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    {
      "id": "S-1208",
      "title": "How verification works in Tinfoil",
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      "path": "/sources/tinfoil-docs-verification-in-tinfoil/"
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      "path": "/sources/de-meulemeester-battering-ram/"
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      "authors": "B. Schlüter & S. Shinde",
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      "path": "/sources/schluter-rmpocalypse/"
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      "id": "S-1213",
      "title": "SEV-SNP RMP Initialization Vulnerability (AMD-SB-3020)",
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      "path": "/sources/amd-sb-3020-rmp-initialization/"
    },
    {
      "id": "S-0014",
      "title": "On TEEs for Privacy-Preserving Monitoring in AI Governance",
      "authors": "Gloria Z",
      "year": 2026,
      "url": "https://techgov.intelligence.org/blog/on-tees-for-privacy-preserving-monitoring-in-ai-governance",
      "path": "/sources/zhao-tees-privacy-preserving-monitoring/"
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    {
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      "authors": "C. Schnabl et al.",
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      "path": "/sources/schnabl-attestable-audits/"
    },
    {
      "id": "S-0019",
      "title": "Verifying AI Compute by Bounding Unexplained Information Exfiltration",
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      "year": 2026,
      "url": "https://openreview.net/forum?id=qtgG5HZSsk",
      "path": "/sources/petrie-bounding-unexplained-information-exfiltration/"
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      "title": "Verifying LLM Inference to Detect Model Weight Exfiltration",
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      "url": "https://arxiv.org/abs/2511.02620",
      "path": "/sources/rinberg-verifying-llm-inference-weight-exfiltration/"
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    {
      "id": "S-1507",
      "title": "Adversarial Entropy Inflation Against Gumbel-Based Inference Verification",
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      "path": "/sources/kezins-adversarial-entropy-inflation/"
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    {
      "id": "S-1508",
      "title": "Haiku to Opus in Just 10 bits: LLMs Unlock Large Compression Gains",
      "authors": "R. Rinberg et al.",
      "year": 2026,
      "url": "https://arxiv.org/abs/2604.02343",
      "path": "/sources/rinberg-haiku-to-opus-compression/"
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    {
      "id": "S-0018",
      "title": "A System Overview for Near-Term, Low-Trust AI Compute Verification",
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      "year": 2026,
      "url": "https://intelligence.org/wp-content/uploads/2026/06/A-system-overview-for-near-term-low-trust-AI-compute-verification.pdf",
      "path": "/sources/cankaya-system-overview-low-trust-compute-verification/"
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}