Is the message that the MME sends the UE containing its allocated IP address encrypted?

Question

There are couple of procedures are defined which consist of NAS as well as RRC signalling messages exchange.
Some of the NAS message sends to an UE through RRC Connection Reconfiguration message as piggybacked and some as DL Info transfer.

I want to know, Is there any procedure exists in lte when an UE receives RRC Connection Reconfiguration along with NAS message and responds back to network with NAS message first and then Reconfiguration Complete to eNodeB.

Usually, I saw UE sends RRC Connection Reconfiguration Complete message first then NAS response message.

Answer 1

If I understood your question then answer is yes. Since security procedure has been already completed before sending the attach accept message to UE, ESM information that actually contains the IP address assigned to UE is security protected.

Comments

Thank you very much for your answer...So I understand that if someone is sniffing LTE packets (for example using Wireshark) s/he cannot discover my IP address and carry on IP attacks on my cellphone or other device... Am I right?