[rc5] Some thoughts on finding the key

Rob Winters rob at annapurna.com
Thu Oct 23 21:18:44 EDT 1997


On Thu, 23 Oct 1997, Jeff Woods wrote:
<snip> 
> Obviously, you're not doing a FULL string compare on "The unknown message
> is:" after the decryption attempt -- the longer a string compare, the
> longer it takes.   I assume that the algorithm for the compare itself is
> damn good, and coded in tight assembly language, but just for my own
> optimizing curiousity, what is the algorithm, at least in general terms?

Hmmm, "strings" reveals a couple of interesting constants:

"The" and "The unkn"

What might they be for?  ;-)

 /// Rob

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