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Re^3: strings to number and XOR

by Anonymous Monk
on Oct 07, 2009 at 17:01 UTC ( #799761=note: print w/ replies, xml ) Need Help??


in reply to Re^2: strings to number and XOR
in thread strings to number and XOR

I think I solved this. I just added 1 more, since an extra byte or two in the key doesn't hurt anything.

$key = "\x4f\xcb" x ((length($msg)/2)+1);
Aaron


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Re^4: strings to number and XOR
by almut (Canon) on Oct 07, 2009 at 17:20 UTC
    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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