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Content for TS 33.180 Word version: 18.1.0

1… 4… 4.3.4 4.3.5 5… 5.1.3 5.1.4… 5.2… 5.2.3 5.2.4 5.2.5 5.2.6… 5.3… 5.4… 6… 7… 7.3… 8… 9… 9.4… 10… A… B… C… D… E… F… J… L…

F.1 KDF interface and input parameter construction F.2 Hash functions H.1 General H.2 MKFC Receipt H.3 MSCCK Distribution H.4 Use of multicast signalling keys (MKFC and MSCCK) I.1 Overview I.2 Location of a signalling proxy I.3 Functions of a signalling proxy
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F (Normative) Key derivation and hash functions p. 172

F.1 KDF interface and input parameter construction p. 172

F.1.1 General p. 172

F.1.2 FC value allocations p. 172

F.1.3 Calculation of the User Salt for GUK-ID generation p. 172

F.1.4 Calculation of keys for application data protection p. 172

F.1.5 Calculation of keys for MCData payload protection p. 173

F.2 Hash functions p. 173

F.2.1 Generation of MIKEY-SAKKE UID p. 173

F.2.1.1 Overview p. 173

F.2.1.2 Example UID p. 174

G (Normative) Key identifiers p. 176

H (Normative) Support for legacy multicast key (MKFC) and for MSCCK p. 177

H.1 General p. 177

H.2 MKFC Receipt p. 177

H.3 MSCCK Distribution p. 177

H.4 Use of multicast signalling keys (MKFC and MSCCK) p. 177

I (Normative) Signalling Proxies |R15| p. 178

I.1 Overview p. 178

I.2 Location of a signalling proxy p. 179

I.2.1 Overview p. 179

I.2.2 Deployment with an untrusted SIP Core p. 179

I.2.3 Deployment with a trusted SIP Core p. 180

I.3 Functions of a signalling proxy p. 181

I.3.1 Overview p. 181

I.3.2 Identifier modification (topology hiding) p. 181

I.3.3 Resilience against signalling storm p. 181

I.3.4 Client connection to a CS Proxy p. 181

I.3.5 CSK key download from a CS Proxy p. 181

I.3.6 MuSiK and MSCCK key download from a CS Proxy p. 182

I.3.7 Signalling protection by the IS Proxy p. 182

I.3.8 Creation of KMS Redirect Responses (KRRs) p. 182

I.3.9 Policy enforcement p. 182