In-depth engineering evaluation of FIDO Alliance Level 3 and 3+ requirements, side-channel attack countermeasures, and biometric security boundaries.
Level 3+ represents the pinnacle of commercial authenticator security, mandating resistance against state-sponsored physical and electrical attacks. AuthHSM meets these criteria by incorporating differential power analysis (DPA) masking, hardware clock randomization, and Common Criteria certified cryptographic execution cores.
Biometric templates are encrypted using hardware-fused AES-256 keys and stored in isolated secure non-volatile memory. During authentication, raw biometric sensor input is streamed directly over encrypted SPI buses into the enclave, where feature vector extraction and matching occur without host CPU access, achieving a False Acceptance Rate (FAR) under 1:100,000.
Enterprise administrators can enforce strict authenticator fleet policies by validating AuthHSM attestation certificates during WebAuthn registration ceremonies, ensuring that only certified Level 3+ physical hardware tokens are permitted to access mission-critical corporate workloads.