Insecure Implementation of Security Best Practices: of hashing, CAPTCHA's and Caching

The document discusses insecure implementations of common security practices like salted hashing, CAPTCHAs, and browser caching. For salted hashing, insecure practices include generating the salt on the client-side, using a limited set of salts, reusing the same salt for a user, and not reinitializing salt values between logins. For CAPTCHAs, issues include verifying the CAPTCHA on the client-side, having a limited set of CAPTCHA values, replaying image IDs, and implementing CAPTCHAs with text instead of images. For browser caching, not setting no-cache and no-store directives can allow cached sensitive pages to be accessed after logout. The document provides best practices