Products Openwall GNU/*/Linux   server OS John the Ripper   password cracker Free & Open Source for any platform Pro for Linux (RPM package) Pro for Mac OS X (dmg package) Wordlists   for password cracking passwdqc   policy enforcement phpass   password hashing in PHP crypt_blowfish   ditto in C/C++ tcb   better password shadowing Pluggable Authentication Modules scanlogd   port scan detector popa3d   tiny POP3 daemon blists   web interface to mailing lists msulogin   single user mode login Services Publications Articles Presentations Community Mailing lists Community wiki Donations Resources Source code repository (CVSweb) File archive & mirrors How to verify digital signatures Password recovery resources Recommended books What's new

Openwall's Recommended Book Store

We highly recommend the few selected books below, as well as those published by No Starch Press (not your usual publisher!) Please also check out Solar Designer's foreword to Michal Zalewski's excellent Silence on the Wire, as well as our articles and presentations.