[15450] in cryptography@c2.net mail archive
Re: Reusable hashcash for spam prevention
daemon@ATHENA.MIT.EDU (Adam Back)
Tue May 25 16:21:57 2004
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Tue, 25 May 2004 16:10:21 -0400
From: Adam Back <adam@cypherspace.org>
To: Fearghas McKay <fm@st-kilda.org>
Cc: "R. A. Hettinga" <rah@shipwright.com>, e$@vmeng.com,
cryptography@metzdowd.com
In-Reply-To: <p06100501bccfc27f6cf6@[81.2.117.213]>
FYI Richard amended the figures in the paper which makes things 10x
more favorable for hashcash in terms of being an ecomonic defense
against spammers.
Richard wrote on asrg:
| we're grateful (albeit a little embarrassed) for the consideration
| given to one of our figures by Ted Wobber (MS Research) who has
| pointed out a tenfold error in our sum involving an 0.0023% response
| rate
|
| we'll be revising our text accordingly -- since this will weaken our
| statements about the "economic argument" ... though it does _not_
| affect our analysis based on use of zombies.
Adam
---------------------------------------------------------------------
The Cryptography Mailing List
Unsubscribe by sending "unsubscribe cryptography" to majordomo@metzdowd.com
