DuckDetector flags several behavioral anomalies that real TEE/StrongBox
hardware exhibits but our software interceptor did not:
- LRU pruning: cap concurrent ops at 15 (TEE) / 4 (StrongBox) per UID,
aborting oldest when exceeded — matches AOSP keystore2 malus scoring
- StrongBox param guard: forward unsupported params (RSA>2048, non-P256)
to real HAL for proper rejection instead of generating in software
- StrongBox latency floors: 250ms keygen, 80ms sign to match real SE
timing characteristics
- Sliding-window op limit for hardware-generated StrongBox keys that
bypass the software pruning path
- Domain.APP lookup path for createOperation to find software-generated
keys that never reach keystore2's database
Enginex0
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