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WINBIO_E_INVALID_BUFFER_ID
WINBIO_E_INVALID_BUFFER_ID belongs to newer secure biometric data handling, where protected components exchange opaque framework-managed references instead of exposing biometric sample contents to ordinary application code. The identifier is meaningful only in the context that created and owns the secure buffer.
Track buffer ownership and operation lifetime
- Log the biometric unit, operation, and pipeline/session transition associated with the identifier without dumping protected biometric data.
- Check for reuse after the producing operation completed, cancellation, sensor restart, or secure-component reinitialization.
- Do not derive a buffer ID from a pointer, array index, or persisted application value; keep framework identifiers opaque.
Microsoft’s secure biometric model is designed so sensitive sample data is not exposed to the normal OS. ESS similarly uses isolated memory paths or match-on-sensor hardware. A stale or cross-context buffer reference violates that ownership model. Repeating the call with the same identifier is unlikely to help; reconstruct the operation through the framework so the current secure pipeline supplies a valid reference.
Secure biometric design · Enhanced Sign-in Security isolation · WBF plug-in architecture
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