This page indexes all the Protection Mechanisms I’ve found: Protection Mechanism Index.

  1. Whitelisting
    • For advanced users who want to protect their accounts from attack, give them the option to allow login only from certain IP addresses.
  2. Blacklisting
  3. Breaking Enumeration
    • Preventing enumeration by introducing randomness. Eg. Assign unique but random login URLs to blocks of users so that not all users can access the site from the same URL
  4. Invite Only
  5. Verification Links
    • Email Verification, Phone no. Verification