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=head1 EXAMPLE

	my $key = pack("H32", "0123456789ABCDEF0123456789ABCDEF");
	my $cipher = new IDEA $key;
	my $ciphertext = $cipher->encrypt("plaintex");	# NB - 8 bytes
	print unpack("H16", $ciphertext), "\n";

=head1 SEE ALSO

Crypt::CBD, Crypt::DES, Crypt::Blowfish

Bruce Schneier, I<Applied Cryptography>, 1995, Second Edition,
published by John Wiley & Sons, Inc.


=head1 COPYRIGHT

This implementation is copyright Systemics Ltd ( http://www.systemics.com/ ).

The IDEA algorithm is patented in Europe and the United States