I-D ACTION:draft-jennings-sip-hashcash-00.txt

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A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: SIP Computational Puzzles
	Author(s)	: C. Jennings
	Filename	: draft-jennings-sip-hashcash-00.txt
	Pages		: 5
	Date		: 2004-7-13
	
SPAM has been a frustrating problem in communications and also in
   SIP.  Forcing the client requesting the service to perform a
   calculation that limits the rate and increases the cost of requests
   is one of the techniques that may help manage this problem.  This
   draft defines a way to allow a UAS to ask the UAC to compute a
   computationally expensive hash based function and present the result
   to the UAS.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-jennings-sip-hashcash-00.txt

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