NAME

Crypt::Vernam - Perl implementation of the Vernam cipher

SYNOPSIS

  use Crypt::Vernam;

  # mod26 mode
  my ($ciphertext, $key) = vernam_encrypt('mod26', 'Vernam');
  my $plaintext = vernam_decrypt('mod26', $ciphertext, $key);

  # xor mode
  ($ciphertext, $key) = vernam_encrypt('xor', 'Vernam');
  $plaintext = vernam_decrypt('xor', $ciphertext, $key);

DESCRIPTION

The Crypt::Vernam module allows you to do a simple but robust encryption/decryption, with the algorithm of Gilbert Sandford, Vernam. This kind of encryption is truly unbreakable as long the key is maintained a secret.

See the README file that came with the Crypt::Vigenere package for more information.

Public methods

vernam_encrypt($mode, $plaintext)

The vernam_encrypt method is called to encrypt the $plaintext string, using $mode (mod26 or xor).

vernam_decrypt($mode, $ciphertext, $key)

The vernam_decrypt method is called to decrypt the $ciphertext string, using $mode (mod26 or xor) and decryption key $key.

EXPORT

vernam_encrypt vernam_decrypt

AUTHOR

Manuel Gebele, <forensixs[at]gmx.de>

COPYRIGHT AND LICENSE

Copyright (C) 2008 by Manuel Gebele.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.8 or, at your option, any later version of Perl 5 you may have available.