Clicking on the Download Now (Visit Site) button above will open a connection to a third-party site. Download.com cannot completely ensure the security of the software hosted on third-party sites.
From Openwall Project:
John the Ripper is a fast password cracker intended primarily for use by systems administrators to detect and eliminate weak user passwords of Unix-like and Windows systems. John the Ripper Pro for Mac OS X features a native package (dmg), universal binary, support for SSE2 and AltiVec acceleration (on Intel and PowerPC, respectively), a large multilingual wordlist, and revised documentation.
