PASSWORD CRACKING TOOLS

John the Ripper
http://www.openwall.com/john
Supports hundreds of hash and cipher types (including popular ones such as NTLM, raw MD5, etc., and even things such as encrypted OpenSSH private keys, ZIP and RAR archives, PDF files, etc.)

Rainbow Crack
http://project-rainbowcrack.com
Generates rainbow tables for using while performing the attack. Which helps in reducing the time in performing the attack.

Cain and Abel
http://www.oxid.it/cain.html
It is a password recovery tool for Windows. It allows easy recovery of various kind of passwords by sniffing the network, cracking encrypted passwords using Dictionary, Brute-Force and Cryptanalysis attacks, recording VoIP conversations, decoding scrambled passwords, recovering wireless network keys, revealing password boxes, uncovering cached passwords and analyzing routing protocols.
Exploits weakness present in protocol's standards, authentication methods and caching mechanisms.

L0phtCrack
http://www.l0phtcrack.com
L0phtCrack is used to crack Windows passwords. It uses dictionary, brute-force, hybrid attacks, and rainbow tables. The most notable features of l0phtcrack are scheduling, hash extraction from 64 bit Windows versions, multiprocessor algorithms, and networks monitoring and decoding.

Ophcrack is another brute-forcing tool specially used for cracking Windows passwords. It cracks Windows password by using LM hashes through rainbow tables. it can crack Windows password in few minutes.
Ophcrack is also available as LiveCD.

Crack is one of the oldest password cracking tools. It is a password-cracking tool for the UNIX system. It is used to check weak passwords by performing dictionary attacks.

Claims to be fastest CPU based password cracking tool. It is free and comes for Linux, Windows and Mac OS platforms. Supports various hashing algorithms including LM Hashes, MD4, MD5, SHA-family, Unix Crypt formats, MySQL, Cisco PIX. It supports various attacks including Brute-Force attack, Combinator attack, Dictionary attack, Fingerprint attack, Hybrid attack, Mask attack, Permutation attack, Rule-based attack, Table-Lookup attack and Toggle-Case attack.

It claims to crack around 10 million passwords per second on a good computer. It supports various attacking methods including Mask attack, Dictionary attack, Hybrid attack and Attack with Rainbow tables. It supports over 400 hashing algorithms.

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