[RC5] 40 bit encryption

John Campbell jcampbel at lynn.ci-n.com
Fri Mar 15 16:14:10 EST 2002

On Fri, 15 Mar 2002, Paul Goyette wrote:

> Comparing the dnetc client's key rate isn't really useful here.
> 1. The client does not completely decode the message, it just tries
>    each key to see if the first few bytes of the result matches the
>    known text.
	The contest is set up that way for a reason. The idea is that, in a
real-world situation, it's likely that the cracker will know what some of the
plaintext should look like... headers that're set up in a standardized
manner, for example. Thus you can decode that portion of the message,
compare to known results, and find the key, just like d.net does it.

John Campbell
jcampbel at lynn.ci-n.com

QotD:  Time is nature's way of making sure that everything doesn't happen at

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