Summary

Server security relies on the COSE encoding of the public key and metadata stored within a standard credential object retrieved after authentication. The system retrieves this encoded public key object and uses it to verify the signature that was created by hashing the client data JSON. This process involves taking the authenticatorData bytes and performing a SHA-256 hash on the clientDataJSON data. A standard COSE credential object serves as the primary structure that encodes both the public key and necessary metadata, ensuring that the cryptographic chain is complete and valid. While Web Authentication offers convenience, it serves only as a means to secure the initial connection and credential exchange; true security depends on embedding robust thinking and defensive practices into every stage of software development.

Title

Guide to Web Authentication

Description

An introduction to Web Authentication (WebAuthn), the new API that can replace passwords with strong authentication.

Keywords

public, server, authentication, credential, user, spec, data, registration, read, signature, authenticator, object, attestation, will, private, assertion, password

NS Lookup

A 185.199.109.153, A 185.199.111.153, A 185.199.110.153, A 185.199.108.153

Dates

Created 2026-04-15

Updated 2026-04-15

Summarized 2026-04-16