opaque-token-based-authentication-pattern

What problem does it solve?

This Skill addresses the challenge of securely authenticating users on the server-side using opaque tokens, ensuring that only authorized individuals can access resources and preventing common vulnerabilities like session fixation and token guessing.

Core Features & Use Cases

• Secure Token Generation: Employs cryptographically secure pseudo-random number generators (CSPRNGs) to create tokens with sufficient entropy, preventing brute-force attacks.
• Robust Lifecycle Management: Implements essential timeout policies (idle and absolute) and defines clear procedures for token invalidation upon logout, credential changes, or re-authentication.
• Use Case: When building a web application, this Skill provides the blueprint for implementing a secure session management system where user sessions are tracked via opaque tokens stored in secure cookies, ensuring that each user's session is uniquely identified and protected.

Quick Start

Implement opaque token-based authentication by ensuring tokens have at least 128 bits of entropy and are transmitted only over HTTPS.