Patent ID: 8713320

Claim:
A security authentication method, characterized by comprising: verifying a feature identifier to identify terminal equipment, wherein the terminal equipment is machine-to-machine equipment; and obtaining a key corresponding to the feature identifier, so as to perform secure communication with the terminal equipment according to the key, wherein the feature identifier is an equipment identifier of the terminal equipment, and the verifying of the feature identifier comprises: sending the equipment identifier to verification equipment for verification, wherein the equipment identifier is a received equipment identifier sent by the terminal equipment, and the verification equipment is used to verify the equipment identifier, and wherein before the sending the equipment identifier to the verification equipment for verification, wherein the equipment identifier is the received equipment identifier sent by the terminal equipment, and the verification equipment is used to verify the equipment identifier, the method further comprises: sending a request message to the terminal equipment, and receiving an equipment identifier which is sent by the terminal equipment according to the request message and is encrypted by the terminal equipment according to a cipher key and/or an integrity key, wherein the cipher key and the integrity key are generated after authentication and key agreement is successfully performed according to a user identifier; and sending the equipment identifier to the verification equipment for verification, wherein the equipment identifier is the received equipment identifier sent by the terminal equipment, and the verification equipment is used to verify the equipment identifier, comprises: decrypting the encrypted equipment identifier, and sending the decrypted equipment identifier to the verification equipment for verification.