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Password Tools

Crack

The Crack program by Alex Muffett. A password-cracking program with a configuration language, allowing the user to program the types of guesses attempted.

cracklib

The cracklib distribution by Alex Muffett. A library of functions that can be called from passwd-like programs to try to prevent users from choosing passwords that crack would be able to guess

OPIE

OPIE (One Time Passwords in Everything) An S/Key derivative (the name was changed to avoid trademark infringement) developed at the US Naval Research Laboratory (NRL) over the past few years. OPIE implements the IETF One-Time Passwords (OTP) standard as per RFC-1938 and runs out of the box on most versions of UNIX. OPIE supports MD5 in addition to MD4 and has a number of other security enhancements when compared with the original Bellcore S/Key.

Passwd+

The passwd+ program by Matt Bishop. A proactive password checker that is driven by a configuration file to determine what types of passwords are and are not allowed. The configuration file allows the use of regular expressions, the comparison of passwords against the contents of files (e.g., dictionaries) and the calling of external programs to examine the password

bruteforce.c

Simple bruteforce crack algoritm

Password Tools
Crack	The Crack program by Alex Muffett. A password-cracking program with a configuration language, allowing the user to program the types of guesses attempted.
cracklib	The cracklib distribution by Alex Muffett. A library of functions that can be called from passwd-like programs to try to prevent users from choosing passwords that crack would be able to guess
OPIE	OPIE (One Time Passwords in Everything) An S/Key derivative (the name was changed to avoid trademark infringement) developed at the US Naval Research Laboratory (NRL) over the past few years. OPIE implements the IETF One-Time Passwords (OTP) standard as per RFC-1938 and runs out of the box on most versions of UNIX. OPIE supports MD5 in addition to MD4 and has a number of other security enhancements when compared with the original Bellcore S/Key.
Passwd+	The passwd+ program by Matt Bishop. A proactive password checker that is driven by a configuration file to determine what types of passwords are and are not allowed. The configuration file allows the use of regular expressions, the comparison of passwords against the contents of files (e.g., dictionaries) and the calling of external programs to examine the password
bruteforce.c	Simple bruteforce crack algoritm