NAME Crypt::Eksblowfish - the Eksblowfish block cipher DESCRIPTION Eksblowfish is a variant of the Blowfish cipher, modified to make the key setup very expensive. ("Eks" stands for "expensive key schedule".) This doesn't make it significantly cryptographically stronger, but is intended to hinder brute-force attacks. It also makes it unsuitable for any application requiring key agility. It was designed by Niels Provos and David Mazieres for password hashing in OpenBSD. Eksblowfish is a parameterised (family-keyed) cipher. It takes a cost parameter that controls how expensive the key scheduling is. It also takes a family key, known as the "salt". Cost and salt parameters together define a cipher family. Within each family, a key determines an encryption function in the usual way. This distribution also includes an implementation of "bcrypt", the Unix crypt() password hashing algorithm based on Eksblowfish. INSTALLATION perl Build.PL ./Build ./Build test ./Build install AUTHOR Eksblowfish guts originally by Solar Designer (solar at Modifications and Perl interface by Andrew Main (Zefram) . COPYRIGHT Copyright (C) 2006, 2007, 2008, 2009, 2010 Andrew Main (Zefram) The original Eksblowfish code (in the form of crypt()) from which this module is derived is in the public domain. It may be found at . LICENSE This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.