Recently someone proposed a system which combined ecash and hashcash
for email postage. The effect is to get a form of reusable hashcash.
Here is some analysis.
There are already proposals and even some working code for hashcash email
postage. See http://www.camram.org/. This is intended as an
--- begin forwarded text
Date: Tue, 18 May 2004 14:41:31 +0100
To: R. A. Hettinga [EMAIL PROTECTED], [EMAIL PROTECTED],
[EMAIL PROTECTED]
From: Fearghas McKay [EMAIL PROTECTED]
Subject: Re: Reusable hashcash for spam prevention
Cc: Richard Clayton [EMAIL PROTECTED]
and the data
--- begin forwarded text
Date: Tue, 18 May 2004 14:41:16 +0100
To: R. A. Hettinga [EMAIL PROTECTED], [EMAIL PROTECTED],
[EMAIL PROTECTED]
From: Fearghas McKay [EMAIL PROTECTED]
Subject: Re: Reusable hashcash for spam prevention
Cc: Richard Clayton [EMAIL PROTECTED]
This was posted