NAME
    Crypt::TEA - Tiny Encryption Algorithm

SYNOPSIS
    use Crypt::TEA;

    $tea = Crypt::TEA->new($key);

    $ciphertext = $tea->encrypt($plaintext);

    $plaintext = $tea->decrypt($ciphertext);

DESCRIPTION
    This module implements TEA encryption, as described in
    <http://www.ftp.cl.cam.ac.uk/ftp/papers/djw-rmn/djw-rmn-tea.html>.

    TEA is an extremely simple and fast symmetric cipher with low setup
    time. It depends on a large number of iterations rather than a
    complex algorithm for security.

    The module supports the Crypt::CBC interface, with the following
    functions.

  Functions

    blocksize
        Returns the size (in bytes) of the block.

    keysize
        Returns the size (in bytes) of the key.

    new($key, $rounds)
        This creates a new Crypt::TEA object with the specified key
        (assumed to be of keysize() bytes). The optional rounds
        parameter specifies the number of rounds of encryption to
        perform, and defaults to 32.

    encrypt($data)
        Encrypts $data (of blocksize() bytes) and returns the
        corresponding ciphertext.

    decrypt($data)
        Decrypts $data (of blocksize() bytes) and returns the
        corresponding plaintext.

SEE ALSO
    Crypt::CBC, Crypt::Blowfish, Crypt::DES

ACKNOWLEDGEMENTS
    Dave Paris, for taking the time to discuss and review the initial
    version of this module, making several useful suggestions, and
    contributing tests.

AUTHOR
    Abhijit Menon-Sen <ams@wiw.org>

    Copyright 2001 Abhijit Menon-Sen. All rights reserved.

    This is free software; you may redistribute and/or modify it under
    the same terms as Perl itself.