This is Crypt::DES_EEE3, a module implementing Tripe-DES EEE encryption and decryption, a derive of Crypt::DES_EDE3 by Benjamin Troot <ben@rhumba.pair.com>. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See <http://www.perl.com/perl/misc/Artistic.html> Copyright 2003 by Kang-min Liu <gugod@gugod.org>.