IEC 62351 - Power Systems Communication Security 4:6: Part 4, clause 6: transport security (TLS application, cipher suites, session resumption and renegotiation, trust anchors, certificate size, revocation evaluation period, certificate validation, security events; OSI and XMPP environments)

Transport security applies TLS per part 3 with the part's own statements on the cipher suite concept, session resumption and renegotiation, the number of trust anchors, certificate size, the evaluation period for revocation state, certificate validation and security event handling; in an OSI environment the TCP ports, the conditions for disabling TLS and the supported suites are specified, and an XMPP environment has its own T-security mapping.