Consult google, -- vingere cipher, xor and possibly RSA may be feasible options.
iamthwee
Posting Expert
5,950 posts since Aug 2005
Reputation Points: 1,543
Solved Threads: 439
MosaicFuneral
Posting Virtuoso
1,691 posts since Nov 2008
Reputation Points: 888
Solved Threads: 116