postage payment scheme for email based on hash calculations
Hash cash is a payment scheme that uses CPU cycles as the form of payment.
This can be used as a counter-measure for junk email (spam) by using the hash
cash token as a proof of payment for each email that you sent.
HASHCASH(1) hashcash HASHCASH(1)
hashcash - hashcash anti-spam / denial of service
Mint (create) stamps:
hashcash -m [ [ options ] [ resource ... ] ... ]
hashcash -c [ [ options ] -r resource ... ] [ stamp ... ]
hashcash -s [ options
hashcash (1.21-1.1+b1) sid; urgency=low
* Binary-only non-maintainer upload for hurd-i386; no source changes.
* Rebuild without debian-ports packages
-- Debian GNU/Hurd Build Daemon <firstname.lastname@example.org> Wed, 09 May 2012 15:46:19 +0200
hashcash (1.21-1.1) unstable; urgency=low
* Non-maintainer upload.
* Enable hardened build flags (Closes: #655864)
hashcash-1.21 - 24-Mar-2005 - Adam Back <email@example.com>
* fix potential heap overflow bug reported by
Andreas Seltenreich <firstname.lastname@example.org>
hashcash-1.20 - 20-Dec-2005 - Adam Back <email@example.com>
* fix bug that -w reports using version 0 semantics even with
version 1 stamps (was ignoring the version field and so
defaulting to version 0 semantics).
* rest are
This package was debianized by Hubert Chan <firstname.lastname@example.org> on
Sat, 27 Dec 2003 15:23:30 -0500.
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