Entity authentication method and device
A technology for identifying entities and messages, applied in the field of network security, can solve problems such as the inability to determine who the other party is and potential safety hazards
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[0048] See figure 1 , the present invention provides an entity authentication method. When the method is implemented, entity A and entity B have shared a pre-shared key (Pre-Shared key, PSK) and know each other's identity, and entity A's identity as ID A , the identity of entity B is ID B , the method includes the following steps:
[0049] Step 1. Entity A generates random number N A , and send to Entity B.
[0050] Step 2. Entity B receives N A After that, generate a random number N B and the random number ZSEED used to seed the key B , calculate the key MKA||KEA||KIA=KDF1(N A ,N B ,PSK,ID A ,ID B ), calculate the ciphertext EncData B =ENC(KEA,N B ||N A ||ID B ||ID A ||ZSEED B ), calculate the message authentication code MAC B =MAC1(KIA,N B ||N A ||EncData B ), Entity B sends N B ||N A ||EncData B ||MAC B For entity A, MKA is an authentication key, KEA is a message encryption key, KIA is a message integrity key, KDF1 is a key derivation algorithm, ENC ...
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