https://takao.blog/en/tags/passkeys/Recent content in Passkeys on Commentary of TakaoHugo -- gohugo.ioenCommentary of TakaoSat, 13 Jun 2026 23:11:50 +0900https://takao.blog/en/web/webauthn-passkeys/Tue, 02 Apr 2024 00:00:00 +0900https://takao.blog/en/web/webauthn-passkeys/<img src="https://takao.blog/img/thumnail.webp" alt="Featured image of post WebAuthn and Passkeys: Passwordless Authentication in 2024" /><p>Passwords have been the primary authentication mechanism for decades, but they come with well-documented security and usability problems. WebAuthn (Web Authentication) and the emerging passkey ecosystem promise to replace passwords with cryptographically secure, phishing-resistant authentication. As of 2024, passkey support has reached critical mass across all major platforms, making this the ideal time to implement passwordless authentication.</p> <h2 id="understanding-webauthn">Understanding WebAuthn </h2><p>WebAuthn is a W3C standard that enables public-key cryptography-based authentication on the web. The core flow involves two operations: registration and authentication. During registration, the server sends a cryptographic challenge to the client, the authenticator creates a new key pair, and the public key is stored on the server. During authentication, the server sends a challenge, the authenticator signs it with the private key, and the server verifies the signature against the stored public key.</p>