[10907] in cryptography@c2.net mail archive
Re: Shortcut digital signature verification failure
daemon@ATHENA.MIT.EDU (Adam Back)
Fri Jun 21 15:28:50 2002
Date: Fri, 21 Jun 2002 17:01:02 +0100
From: Adam Back <adam@cypherspace.org>
To: "Steven M. Bellovin" <smb@research.att.com>
Cc: Bill Frantz <frantz@pwpconsult.com>,
cryptography@wasabisystems.com
In-Reply-To: <20020621154222.7C3297B4B@berkshire.research.att.com>; from smb@research.att.com on Fri, Jun 21, 2002 at 11:42:22AM -0400
Client puzzles are interactive, but hashcash is non-interactive being
intended to support store-and-forward scenarios -- the client
effectively chooses his own challenge. There's a reference library
for client and server here:
http://www.cypherspace.org/hashcash/
Adam
On Fri, Jun 21, 2002 at 11:42:22AM -0400, Steven M. Bellovin wrote:
> In message <20020621162638.A822154@exeter.ac.uk>, Adam Back writes:
> >Doesn't a standard digital signature plus hashcash / client puzzles
> >achieve this effect?
>
> That involves extra round trips, and as such isn't suitable for all
> uses.
---------------------------------------------------------------------
The Cryptography Mailing List
Unsubscribe by sending "unsubscribe cryptography" to majordomo@wasabisystems.com
