----- Original Message ----- From: "Jack Lloyd" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, October 03, 2003 5:13 AM Subject: DH with shared secret
> This was just something that popped into my head a while back, and I was > wondering if this works like I think it does. And who came up with it > before me, because it's was too obvious. It's just that I've never heard of > something alone these lines before. > > Basically, you share some secret with someone else (call it S). Then you > do a standard issue DH exchange, but instead of the shared key being > g^(xy), it's g^(xyS) Not exactly the same thing, but you get the same properties: SKEME. See section 3.3.2, Pre-shared key and PFS, of SKEME: A Versatile Secure Key Exchange Mechanism for internet, Hugo Krawczyk. http://citeseer.nj.nec.com/krawczyk96skeme.html --Anton --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to [EMAIL PROTECTED]
