Spring Full-Stack Practical Cases

Feb 21, 2024 · Information Security

How to Secure OAuth2 Authorization Code Flow with PKCE in Spring Boot 3

This article explains the differences between confidential and public OAuth2 clients, illustrates the authorization‑code interception risk, and provides a step‑by‑step Spring Boot 3 implementation of PKCE—including configuration, code verifier generation, and token exchange—to harden security.