[RC5] DES-II question

Remi Guyomarch rguyom at mail.dotcom.fr
Fri Mar 27 02:35:02 EST 1998


Ivo Janssen wrote:
> 
> On Wed, 25 Mar 1998, Marc Sissom wrote:
> 
> > Petr Novotny wrote:
> > >
> > > I was just curious - how many "false positives" were there during
> > > DES-II contest? (I hope this information is not classified...)
> >
> > I bet it is classified since the number is directly related to the
> > number of plain/cypher-text that are tested on each key.
> 
> Classified? Why? I don't see a reason. The number of
> plain/cypher-text that are tested on each key must be simple to read
> off from the sources, and those are not secret. They're on
> http://altern.com/rguyom/ as linked from the rc5 homepage.
> Maybe Remi could give us the answer, so we don't have to dig into the
> code.

We check the first 8 bytes.

-- 
Rémi		Don't waste your computer's time. Distribute it!
			http://www.distributed.net/
	    RC5 cores source code : http://altern.com/rguyom/
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