Page "Password" Paragraph 65

Password strength is the likelihood that a password cannot be guessed or discovered, and varies with the attack algorithm used.

Passwords easily discovered are termed weak or vulnerable ; passwords very difficult or impossible to discover are considered strong.

There are several programs available for password attack ( or even auditing and recovery by systems personnel ) such as L0phtCrack, John the Ripper, and Cain ; some of which use password design vulnerabilities ( as found in the Microsoft LANManager system ) to increase efficiency.

These programs are sometimes used by system administrators to detect weak passwords proposed by users.