Mechanism · On-chip telemetry from timing, memory and performance counters
Counters leak information about protected workloads
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SignificantTheoretical argumentOpen
Performance counters have been used as a side channel against TEEs, for example in CounterSEVeillance 6. NVIDIA disables performance counters in full confidential-computing mode, stating that they could provide an avenue for side-channel attacks 7. Richer counters for verification therefore pull against confidentiality.