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- John the Ripper -- Password Cracker
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- John the Ripper is designed to be both powerful and fast. It combines
- several cracking modes in one program, and is fully configurable for your
- particular needs (you can even define a custom cracking mode using the
- built-in compiler supporting a subset of C).
- Out of the box, John supports (and autodetects) the following ciphertext
- formats: standard and double-length DES-based, BSDI's extended DES-based,
- FreeBSD's (and not only) MD5-based and OpenBSD's Blowfish-based.
- With just one extra command (required to extract the passwords), John can
- crack AFS passwords and WinNT LM hashes.
- Unlike other crackers, John doesn't use a crypt(3)-style routine. Instead,
- it has its own highly optimized modules for different ciphertext formats
- and architectures. Some of the algorithms used couldn't be implemented in
- a crypt(3)-style routine: they require a more powerful interface (bitslice
- DES is an example). Additionally, there're assembly routines for several
- processors and architectures (special Intel Pentium version, x86 with MMX,
- generic x86, Alpha EV4, SPARC V8).
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