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Re^4: strings to number and XOR

by almut (Canon)
on Oct 07, 2009 at 17:20 UTC ( #799764=note: print w/replies, xml ) Need Help??

in reply to Re^3: strings to number and XOR
in thread strings to number and XOR

an extra byte or two in the key doesn't hurt anything

It's maybe worth trimming your XORed string to the original length, or else half of your key pattern might leak... (to anyone who makes an educated guess about the procedure)

t h i s i s a t e s t m e s s a g e z 74 68 69 73 20 69 73 20 61 20 74 65 73 74 20 6d 65 73 73 61 67 65 7a 4f cb 4f cb 4f cb 4f cb 4f cb 4f cb 4f cb 4f cb 4f cb 4f cb 4f cb 4f c +b 3b a3 26 b8 6f a2 3c eb 2e eb 3b ae 3c bf 6f a6 2a b8 3c aa 28 ae 35 c +b ^ +^

... just in case you do want to keep it secret (I don't really know what you intent to use this for).

(OTOH, if encryption was the idea, and security was of any relevance, I'd choose a different approach anyway :)

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[Corion]: Maybe I'll just conoct something using Algorithm::Permute to create an (OO) generator for such requests, or a simple function.
[Corion]: For testing I imagine one would want to test a random sampling of such "bad"/"unexpected" requests, while for downloading, one would want to generate them all in order, but not necessarily as a huge list
[Corion]: s/Algorithm:: Permute/Algorithm ::Loops/

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