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Android Keystore — KeyMint/Keymaster implementer's reference

Last modified: 2026-10-23

URL: https://source.android.com/docs/security/features/keystore/implementer-ref

Summary

Android Open Source Project documentation for implementers of the hardware-backed Keystore HAL (KeyMint/Keymaster) running in a TEE or StrongBox secure element: supported algorithms (ECDSA P-256, RSA, AES), key attestation and access-control tags. It defines what a wallet can rely on when binding credentials to a device key — and why only standard ECDSA, not BBS or pairing-based keys, is available in hardware.