How to prohibit some words and letters to use as a Drupal password? I need to prohibit a user from using a few words as a password. E.g I don't want to use these words as a password. Drupal, 123456, Microsoft. When a user submits the registration form with the above terms in the password field then they get a message about the prohibited password.
This module should work. I have never used it before, but it should definitely have the feature to prohibit certain password strings. 
Password Policy Module