Methods for trust information in communication network and related communication equipment and communication device

A network equipment comprising:

• processing circuitry;
• and
• memory coupled with the processing circuitry, wherein the memory includes instructions that when executed by the processing circuitry causes the network equipment to perform operations comprising:
• determining a trust information for each of one or more access networks, wherein the trust information indicates whether each of the one or more access networks is trusted, wherein the determining a trust information for each of one or more access networks comprises protecting a trust information list with a key shared with the communication device to obtain a protected trust information list;
• and
• indicating to a communication device registered or being registered with a communication network whether the one or more access networks is trusted for a current session or a later session, wherein the indicating to the communication device whether the one or more access networks is trusted for a current session or a later session comprises sending the protected trust information list toward the communication device.

A method performed by a communication device registered or being registered with a communication network to dynamically receive trust information, the method comprising:

• receiving a message including a protected trust information list from a network equipment;
• verifying the protection of the message;
• and
• storing the protected trust information list.

A communication device registered or being registered with a communication network adapted to perform operations comprising:

• receive a message including a protected trust information list from a network equipment;
• verify the protection of the message;
• and
• store the protected trust information list.