RE: Just how does it know?

Scott Lipcon (slipcon@cs.jhu.edu)
Thu, 1 May 1997 10:03:12 -0400 (EDT)


> >From http://www.rsa.com/rsalabs/97challenge/index.html:
> > For each contest, the unknown plaintext message is preceded by
> > three known blocks of text that contain the 24-character phrase
> > "The unknown message is: ".
> >If a key encrypts the first 24 characters correctly, I imagine it will be
> >the right key.

This also brings up a point as to how useful it would be to break DES
encryption. If I encrypt a message with a 56 bit key, and you have no
idea what the first 24 characters are, you really have no way of telling
when you manage to pick the right key. I guess this falls under the "lets
not put that in the press release" catagory :)

Scott