"John the Ripper is an open source password cracker that is used
by security researchers to help audit, crack and test password
security. The core project is sponsored by security vendor Openwall
led by developers Alexander Peslyak and Roman Rusakov. Thanks to
funding from security vendor Rapid7, leaders of the open source
Metasploit project, Peslyak and Rusakov were able to expand John
the Ripper with improved performance and capabilities for testing
and cracking password hashes.
"John the Ripper is a tool I have used since the mid-90s, the
team behind it has dedicated a large portion of their to the open
source community and improving the security of open source software
in general," HD Moore, Metasploit chief architect and Rapid7 CSO
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