Zero knowledge( a>b )

Adam Back adam at
Mon May 9 09:28:25 PDT 2005

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


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.

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