Content for TR 33.829 Word version: 12.0.0
4 Overview
5 IMS conferencing
6 SRVCC
7 Services for user groups with high security requirements
8 IMS messaging
9 Communications diversion
10 Mid-call lawful Interception
11 IMS T.38 fax
12 Conclusions
A IANA considerations
B Pre-shared key MIME protection
C MIKEY general extension payload for 3GPP ad-hoc conferencing
D Setup of TLS-PSK using MIKEY
E MIKEY-TICKET profile for pre-shared key MIME protection
F MIKEY general extension payload for message proof-of-origin
$ Change history
4 Overview p. 9
5 IMS conferencing p. 9
5.1 Introduction p. 9
5.1.1 General p. 9
5.1.2 Immediate security observations/requirements p. 10
5.1.3 Requirements p. 11
5.2 Use cases p. 12
5.2.1 Ad hoc conferencing p. 12
5.2.1.1 Main events p. 12
5.2.1.2 Three party conferencing p. 12
5.2.2 Planned conferences p. 13
5.3 Solution(s) p. 13
5.3.1 General p. 13
5.3.2 SDES-based solution p. 14
5.3.2.1 Discussion p. 14
5.3.2.2 Recommended Solution p. 16
5.3.3 KMS-based solution p. 17
5.3.3.1 Introduction p. 17
5.3.3.2 Overview of the solution p. 17
5.3.3.3 Secure conference creation with a conference factory URI p. 18
5.3.3.4 Inviting other users to a secure conference p. 19
5.3.3.4.1 Conference creator includes an URI list at conference creation p. 19
5.3.3.4.2 Conference creator sends REFER to conference focus p. 20
5.3.3.4.3 Conference creator sends REFER to other user p. 23
5.3.3.5 User joining a secure conference p. 24
5.3.3.6 Subscription to conference event package p. 25
6 SRVCC p. 25
7 Services for user groups with high security requirements p. 27
8 IMS messaging p. 28
8.1 Introduction p. 28
8.1.1 General p. 28
8.1.2 Immediate security observations p. 29
8.2 Use cases p. 29
8.3 Solution(s) p. 33
8.3.1 KMS-based solution p. 33
8.3.1.1 Immediate messaging p. 33
8.3.1.1.1 UE sends a SIP MESSAGE p. 33
8.3.1.1.2 UE receives a SIP MESSAGE p. 34
8.3.1.1.3 List server forwards a SIP MESSAGE to multiple recipients using a PSI p. 34
8.3.1.1.4 List server forwards a SIP MESSAGE to multiple recipients using a URI-list p. 34
8.3.1.2 One-to-one session based messaging p. 34
8.3.1.3 Session based messaging conferences p. 35
8.3.2 Solutions that leverage IMS control plane security p. 35
8.3.2.1 Immediate messaging p. 35
8.3.2.2 One-to-one session based messaging p. 35
8.3.2.2.1 General p. 35
8.3.2.2.2 E2m security for one-to-one session based messaging p. 36
8.3.2.2.2.1 Terminating security at an AS p. 36
8.3.2.2.2.2 Terminating security at the IMS access gateway p. 37
8.3.2.2.3 Hop-by-hop security for one-to-one session based messaging p. 37
8.3.2.3 Session based messaging conferences p. 38
8.3.2.4 Preferred approach for IMS messaging security that leverages IMS control plane security p. 38
9 Communications diversion p. 39
9.1 Introduction p. 39
9.2 Use cases and requirements p. 40
9.3 Solution(s) p. 41
9.3.1 SDES-based solution p. 41
9.3.2 KMS-based solution p. 42
10 Mid-call lawful Interception p. 45
11 IMS T.38 fax p. 46
11.1 Introduction p. 46
11.2 Use cases p. 46
11.3 Analysis p. 47
11.4 E2ae security for T.38 fax using DTLS p. 47
12 Conclusions p. 47
12.1 IMS messaging security p. 47
12.2 IMS conferencing security p. 48
12.3 IMS call diversion security p. 48
12.4 Mid-call start of intercept p. 48
12.5 IMS T.38 fax security p. 48
A IANA considerations p. 50
A.1 IANA assignments p. 50
B Pre-shared key MIME protection p. 51
B.1 New smime-type parameter p. 51
B.2 Creating an Auth-Enveloped message p. 51
B.3 Using MIKEY-TICKET to transfer the protection key p. 52
C MIKEY general extension payload for 3GPP ad-hoc conferencing p. 53
C.1 Payload format p. 53
D Setup of TLS-PSK using MIKEY p. 53
E MIKEY-TICKET profile for pre-shared key MIME protection p. 55
F MIKEY general extension payload for message proof-of-origin p. 56
F.1 Payload format p. 56
$ Change history p. 56
