Cookies vs. Local Storage: What’s the Difference? When and Where to Use Each?

Web developers often use client-side storage solutions like cookies and local storage to store user data directly on a browser, enhancing performance and user experience while reducing server load. Cookies are small text files that are accessible by both the client and server, making them suitable for authentication and session management but limited in storage capacity and vulnerable to certain security risks. Local storage offers a larger capacity and persists data across browser sessions without affecting HTTP requests, but it is only accessible on the client side and is not secure for sensitive information. Choosing between these storage methods depends on the specific needs of a web application, emphasizing security measures when handling sensitive data. For dynamic access control and secure management of user permissions, a centralized server-side approach is recommended over relying on client-side storage, which can expose applications to risks like privilege escalation.