Double Submit Cookie Pattern
The Double Submit Cookie Pattern is a web security technique used to prevent Cross-Site Request Forgery (CSRF) attacks. It involves generating a random token (CSRF token) and sending it both as a cookie and as a hidden form field or request parameter. The server then verifies that the token values match before processing the request, ensuring the request originated from the legitimate user's session.
Developers should implement this pattern when building web applications that handle state-changing operations (e.g., form submissions, API calls) to protect against CSRF attacks, which can trick users into performing unintended actions. It's particularly useful for applications that rely on cookie-based authentication, as it provides a lightweight and stateless defense mechanism without requiring server-side token storage.