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The following archive was created by hippie-mail 7.98617-22 on Sat Apr 10 1999 - 01:13:58
bram (bram@gawth.com)
Tue, 1 Sep 1998 00:12:05 -0700 (PDT)
On 31 Aug 1998, Ray Jones wrote:
> Alice and Bob each choose a random salt (Sa and Sb), and trade them.
> they each compute H(Sa+Sb+Number), where Number is their personal
> number/fetish/secret, and H is a secure hash.
>
> they then take turns sending each other a bit from the result. if the
> bits match at each step, they can be reasonably sure they started with
> the same secret. they can iterate with new salt values until they're
> convinced.
Unfortunately, that can potentially leak information about what either
party had as a number even if they don't have the same number. I think a
complete solution must of necessity involve considerable more
cryptographic trickery.
-Bram
The following archive was created by hippie-mail 7.98617-22 on Sat Apr 10 1999 - 01:13:58