SIP Extensions for Caller Identity and Privacy <draft-ietf-sip-privacy-03.txt>

1
SIP Extensions for Caller Identity and
Privacyltdraft-ietf-sip-privacy-03.txtgt

• Flemming Andreasen (fandreas_at_cisco.com)
• W. Marshall, K. K. Ramakrishnan, E. Miller, G.
  Russell, B. Beser, M. Mannette, K.
  Steinbrenner, D. Oran, F. Andreasen, J. Pickens,
  P. Lalwaney, J. Fellows, D. Evans, K. Kelly, M.
  Watson
• IETF - December 2001

2
I-D Evolution

• Privacy-01 draft presented at 50th IETF (Minn.)
• Privacy-02 draft issued in May and thought to be
  ready for WG Last Call
• However several concerns raised off-line
• Scope and Proxy-Require in particular
• Subsequent discussions resulted in refining the
  scope for the privacy draft
• Only address network authenticated
  Remote-Party-ID.
• Remote-Party-ID is inserted by trusted entity
• Assume trusted entity has somehow determined the
  relevant identity information.
• Another draft will deal with the authentication
  problem

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Overview of Changes

• Implications
• Untrusted UA does not include Remote-Party-ID
  header
• Trusted Entity (UA or proxy) inserts it
• New RPID-Privacy header for UA to control privacy
  of Remote-Party-ID header inserted by trusted
  entity.
• Anonymous From header field defaults to full
  privacy as well
• Removed alias and return rpi-id-type from
  Remote-Party-ID
• To avoid Proxy-Require option to encrypt
  Remote-Party-ID headers within trust boundary
  (but other issues here)
• Other changes
• Remote-Party-ID and Anonymity now allowed in
  other messages than INVITE and INVITE-responses.
• INVITE, OPTIONS, extension methods, (REGISTER)

4
Overview of Changes, cont

• Other changes, cont.
• Parts of draft rewritten to better explain
  trusted versus untrusted entity behavior (proxy
  and UA).
• Nature Of Party (Appendix A) updated per list
  discussion
• Added not-applicable, cellular-ordinary, and
  cellular-roaming and mapping from information
  digits (II).
• Next Steps
• Please review and comment
• WG Last Call