Security

AntiSpam Protect Web Form Captcha Plug-in for Drupal
supports English, German, French, Spanish, Russian localization.

Single Login is a session management system for Drupal. It allows the site administrator to create a policy to detect, and prevent, duplicate logins on the same account. This is obviously handy for a site that requires paid subscriptions. Once a duplicate login is detected from a different system, the first login gets logged out. The admin can set a policy that determines how often and within what time period a session can "ping pong" between machines. Should the policy conditions be met, the admin can specify an action,typically to block the offending account.

The salt module allows for Drupal passwords to be 'salted' - an internal string is appended to the password prior to storage - making them less prone to dictionary attacks, rainbow tables and the l

The password_reset module allows for passwords to be reset without involving e-mail addresses through the use of security questions.

Password Strength module provides realistic password strength measurement and server-side enforcement for Drupal sites using pattern-matching and entropy calculation.

Login Security module improves the security options in the login operation of a Drupal site.