Blockchain & Cryptocurrency Glossary

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Biometric Authentication (Wallet)

1 min read
Pronunciation
[bye-oh-meh-trik aw-then-ti-kay-shun]
Analogy
Like using your fingerprint to unlock your smartphone instead of a PIN.
Definition
Use of fingerprint, face recognition, or other biometric factors to unlock wallets or authorize transactions.
Key Points Intro
Biometrics enhance wallet UX and security by:
Key Points

Convenience: Fast, user-friendly unlocking.

Local verification: Biometric data stays on device.

Second factor: Adds layer beyond password/seed.

Fallback: PIN or passphrase backup required.

Example
Trust Wallet on iOS uses Touch ID to unlock the app before signing transactions.
Technical Deep Dive
Mobile OS secure enclave matches live biometric scan to stored template. Wallet app uses LocalAuthentication API to gate access to encrypted keystore.
Security Warning
Biometric spoofing or device compromise can expose keys; always require fallback PIN.
Caveat
Biometric data cannot be changed if compromised; rely on device security.
Related Terms
Software Wallet
Hardware Wallet

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