| Summary: |
The Session Initiation Protocol (SIP) supports communications across
many media types, including real-time audio, video, text, instant
messaging, and presence. In its current form, it allows session
invitations, instant messages, and other requests to be delivered
from one party to another without requiring explicit consent of the
recipient. Without such consent, it is possible for SIP to be used
for malicious purposes, including spam and denial-of-service attacks.
This document identifies a framework for consent-based communications
in SIP.
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