I-D ACTION:draft-tschofenig-sipping-spit-policy-01.txt

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	Title		: A Document Format for Expressing Authorization Policies to tackle Spam and Unwanted Communication for Internet Telephony
	Author(s)	: H. Tschofenig, et al.
	Filename	: draft-tschofenig-sipping-spit-policy-01.txt
	Pages		: 36
	Date		: 2007-7-11

SPAM, defined as sending unsolicited messages to someone in bulk,
   might be a problem on SIP open-wide deployed networks.  The
   responsibility for filtering or blocking calls can belong to
   different elements in the call flow and may depend on various
   factors.  This document defines an authorization based policy
   language that allows end users to upload anti-SPIT policies to
   intermediaries, such as SIP proxies.  These policies mitigate
   unwanted SIP communications.  It extends the Common Policy
   authorization framework with additional conditions and actions.  The
   new conditions match a particular Session Initiation Protocol (SIP)
   communication pattern based on a number of attributes.  The range of
   attributes includes information provided, for example, by SIP itself,
   by the SIP identity mechanism, by information carried within SAML
   assertions.

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