There is a simple protocol for this described in Schneier's Applied Crypto if you have one handy...
(If I recall the application he illustrates with is: it allows two people to securely compare salary (which is larger) without either party divulging their specific salary to each other or to a trusted intermediary). Adam On Mon, May 09, 2005 at 06:00:58AM -0700, Sarad AV wrote: > hi, > > If user A has the integer a and user B has the integer > b, can a zero knowledge proof be developed to show > that a>b,a<b or a=b.