Patent ID: 11909869
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A communication method, comprising:
sending, by user equipment (UE), an N1 message to a security anchor function (SEAF), wherein:
the N1 message carries a Diffie-Hellman (DH) public parameter or a DH public parameter index, the N1 message further carries an encrypted identifier of the UE, and the encrypted identifier is obtained by encrypting a permanent identifier of the UE and a first DH public key;

receiving, by the UE, an authentication request that carries a random number and that is sent by the SEAF, wherein the authentication request carries a second DH public key;
sending, by the UE to the SEAF, an authentication response used to respond to the authentication request, wherein the authentication response carries an authentication result calculated based on a root key and the random number;
deriving, by the UE, a DH symmetric key based on the DH public parameter and the second DH public key; and
deriving, by the UE, an SEAF key based on the DH symmetric key and an authentication server function (AUSF) key, wherein the AUSF key is calculated based on the root key and the random number.