NAME
Acme::DRM - Library providing cryptographic capabilities especially
suited for Digital Rights Management. Protects against Pirates. May
increase global warming. Note: Not guaranteed to protect against Pirates
or increase global warming.
VERSION
Version 0.03
SYNOPSIS
use Acme::DRM qw(secureXOR doubleROT128);
my $intellectualProperty = 'One-hit Wonder Music';
# Encrypt your IP to plug the digital hole
my $encryptedContent = secureXOR($intellectualProperty);
# Invoke the DMCA by encrypting your data, without invoking
# additional overhead for decryption at runtime
my $protectedContent = doubleROT128($intellectualProperty);
EXPORT
secureXOR
doubleROT128
FUNCTIONS
secureXOR
XOR is an extremely convenient method for encrypting a digital media
stream. Given any two of the a) original data, b) encryption key, and c)
encrypted data, you get the third item. Unfortunately, hackers have
compromised the effectiveness of this computationally convenient method.
The weakness is the reuse of a single key. The answer is to use a
variable key, however, key distribution becomes a difficult proposition.
If the key is distributed in the clear, pirates can simply decrypt the
digital media stream, and steal your Intellectual Property. Our solution
is to use the media itself as the key. This function conveniently takes
only the media as a single argument, and automatically XORs the
datastream with a copy of itself, rendering the stream almost completely
unrecoverable without the key: the media itself. This is virtually
hacker-proof, except for one exception: the encrypted datastream is
exactly the same length as the original data, but this is almost never
probably a weakness. This algorithm does guarantee that your original
data will not be recoverable from the encrypted stream without the
proper key. Additionally, use of an incorrect key will not provide
hackers with any sort of clue that they have guessed an incorrect key.
doubleROT128
This function exists to provide a method by which you can protect your
Intellectual Property under the DMCA, without imposing the difficulty of
implementing a separate, potentially insecure decryption algorithm in
your secure media playback application. Simply pass your digital media
to this function, and it will output an encrypted stream, conveniently
passed twice internally through a strong ROT-128 encryption algorithm.
The resulting encrypted content cannot be legally decrypted by a hacker,
since you encrypted it to protect it from hackers and pirates. Further,
you can pass the content through this algorithm multiple times for
enhanced protection. Decryption can be performed by either passing the
encrypted datastream back through this algorithm, or in many cases, the
encrypted stream itself can be used by the playback function.
AUTHOR
Brett T. Warden, "<bwarden-cpan@wgz.org>"
BUGS
Please report any bugs or feature requests to
"bug-acme-drm@rt.cpan.org", or through the web interface at
notified, and then you'll automatically be notified of progress on your
bug as I make changes.
ACKNOWLEDGEMENTS
Thanks to the lobbyists behind the DMCA and the politicians who bought
(or were bought) into the great idea of assigning corporate greed higher
value than constitutionally-asserted citizen rights.
COPYRIGHT & LICENSE
Copyright 2005-2007 Brett T. Warden, all rights reserved.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.