Breakin attempts

[Patrick O'Callaghan]

On Fri, 2010-04-23 at 23:08 +0800, Ed Greshko wrote:
> > "If you think your problem can be solved by cryptography, you don't
> > understand cryptography and you don't understand your problem."
> >   
> Sounds like a pithy quotation that should be found by google.  But, I
> was unable to unearth that quotation.  Do you have a source?

I heard Roger Needham saying it at a conference years ago. He attributed
it to Mike Schroeder. Interestingly, Schroeder, who was also at the
conference, then attributed it to Needham :-) I think it's quoted in one
of Bruce Schneier's books (probably Applied Cryptography) but I don't
have them right here to check.

poc