Authentication

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Authentication Jul 25, 2026 7 min read

OAuth Authorization Code Flow Explained

Implement OAuth Authorization Code with PKCE safely in Spring Security and Node.js, including state, callbacks, token exchange, tests, and mistakes.

Authentication Jul 25, 2026 7 min read

Password Reset Token Best Practices

Build secure single-use password reset tokens in Spring Boot and Node.js with random generation, hash storage, expiry, rate limits, tests, and auditing.