[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
once.

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