This package was debianized by Hubert Chan <hubert@uhoreg.ca> on
Sat, 27 Dec 2003 15:23:30 -0500.

It was downloaded from http://www.hashcash.org/

Upstream Author: Adam Back <adam@cypherspace.org>

Copyright:

The source contains getopt.c and getopt.h, which are copyright by the FSF, and
licensed under the GPL.  On Debian systems, the GPL can be found at
/usr/share/common-licenses/GPL.

The source contains fip180-1.txt, written by the United States government, and
is in the public domain.

The hashcash-sendmail and hashcash-request programs in the contrib directory
are copyright Kyle Hasselbacher, and licensed under the GPL.

The rest of the software is licensed under your choice of (in the upstream
author's preference):
  - Cypherpunks CPL
  - public domain
  - modified BSD (without advertising clause)
  - LGPL 2.1
  - GPL 2

The CPL can be found at http://www.cypherspace.org/CPL/.

On Debian systems, the BSD license can be found at
/usr/share/common-licenses/BSD, the LGPL at /usr/share/common-licenses/LGPL,
and the GPL at /usr/share/common-licenses/GPL.

The upstream author makes the following comments and requests.  They are not
licensing requirements:

- If you have to make changes to make this library work for your system or
  application it would be useful if you could tell me what you had to
  do, and optionally send me the source changes so I can include them
  or update the library.  The aim is to make a practically useful
  library.

- It would be useful if you could inform me if you use or distribute
  hashcash.  The intent here is to give me feedback and insight into the
  areas of application which people find useful in practice.

- If you are unclear on how to use hashcash there is a FAQ here:
  http://www.hashcash.org/faq.html.  If that doesn't answer your question or
  doesn't apply to your usage, feel free to discuss in email.

- It may help the deployment of hashcash as an anti-spam system if different
  systems based on hashcash were interoperable as far as that makes
  sense for your system.  To this end the FAQ
  http://www.hashcash.org/faq.html and Internet-Draft
  http://www.hashcash.org/draft-hashcash.txt document my
  thoughts in this area.  See also the hashcash home page
  http://www.hashcash.org and paper there as I update with links to deployed
  systems which it might be useful for you to interoperate with.
