What are potential pitfalls of implementing a login system that relies on cookies for user authentication?

Potential pitfalls of implementing a login system that relies on cookies for user authentication include security vulnerabilities such as cookie tampering, session hijacking, and cross-site scripting attacks. To mitigate these risks, it is important to properly secure the cookies by using encryption, setting secure and httpOnly flags, and implementing measures to prevent session fixation. 

// Set secure and httpOnly flags for cookies
ini_set('session.cookie_secure', 1);
ini_set('session.cookie_httponly', 1);

// Enable session encryption
ini_set('session.use_cookies', 1);
ini_set('session.use_only_cookies', 1);

// Prevent session fixation
session_regenerate_id(true);

Keywords

cookies user authentication security vulnerabilities session hijacking CSRF (Cross-Site Request Forgery)

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