LuTiao Programming

Nov 1, 2026 · Backend Development

Complete Java Passkey Implementation: Registration, Auth, Anti-Replay & Multi-Device

This article provides a complete Java implementation guide for Passkey passwordless authentication, covering credential registration with challenge generation, public key storage, signature verification, anti-replay protection via one-time challenges, multi-device credential management, account recovery considerations, Spring Security WebAuthn integration, and a layered authentication architecture separating auth methods from session management.