Breez SDK Launches Passkey Login for Seedless Bitcoin Wallets
Breez SDK now supports Passkey Login, enabling self-custodial Bitcoin wallets without requiring users to manage traditional seed phrases.Summary
Breez, a lightning service provider, has integrated Passkey Login into its SDK, allowing developers to create self-custodial Bitcoin wallets that use passkeys for authentication and key derivation, effectively removing the need for users to back up a 12-word seed phrase during normal operation. Breez argues that seed phrases are a major barrier to self-custody for mainstream users, and passkeys offer a more intuitive security model based on familiar biometric authentication. The implementation leverages the Pseudo-Random Function (PRF) extension in the WebAuthn Level 3 specification, which allows the passkey—stored securely on the user's device—to deterministically generate cryptographic outputs needed for wallet functions without ever exposing the private key. While passkeys simplify onboarding and recovery via platform syncs (like iCloud or Google Password Manager), Breez maintains backward compatibility by allowing users to optionally export a standard BIP-39 mnemonic for recovery on non-passkey-supporting wallets.
(Source：Bitcoin Magazine)