What is a secure cookie?

A secure cookie is a type of HTTP cookie that is only transmitted over encrypted connections, such as HTTPS. It is designed to protect sensitive data, such as session IDs or login credentials, from being intercepted by attackers during transmission.

The secure flag is a crucial attribute of secure cookies and ensures that cookies are not sent over unencrypted HTTP, protecting sensitive data from interception or eavesdropping during transmission. This helps prevent man-in-the-middle (MITM) attacks and other vulnerabilities. Modern browsers strictly enforce the Secure attribute as part of best practices for web security.