Steve Orrin writes: [...]
One of the key strengths, as I see it, of graphic encryption is that during decryption via hacking, there is an added time element when a human interface is required to verify the product, ( since it is a graphic picture being produced, regular checksums for intelligible words can't be used sans implementing OCR), even if this is only 10 milliseconds per try this is increases the time to crack
This is an interesting point I hadn't previously considered. Can anyone comment on the state of the art in fast approximate character recognition ? I expect that the people working on recognition of text in TV pictures etc. would have a good idea.
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-Futplex <futplex@pseudonym.com>
I wouldn't think you would have to use OCR to detect a successful decryption. The graphic file is going to have a highly correlated structure, long runs of white space etc. The statistics for such a file would be different than the random distribution you'd get from using the wrong key. Even if the graphics format is compressed, leading to a more even distribution, there might be known plaintext at the beginning of the file, headers, size etc. Ron McCoy Rmccoy@mercury.interpath.net