B.12 IdMS interface security

33.1803GPPRelease 17Security of the Mission Critical (MC) serviceTS

The support of Transport Layer Security (TLS) between the IdM client in the MC UE and the IdM server is mandatory. The profile for TLS implementation and usage shall follow the provisions given in 3GPP TS 33.310 [5], annex E.

If PSK TLS based authentication is supported, the IdM client in the MC UE and the IdMS shall support the TLS version, PSK ciphersuites and TLS Extensions as specified in the TLS profile given in 3GPP TS 33.310 [5], annex E. The usage of pre-shared key ciphersuites for TLS is specified in the TLS profile given in 3GPP TS 33.310 [5], annex E.

Annex C (informative):
OpenID connect detailed flow