Patent ID: 8510565

Claim:
A utility bidirectional entity authentication method based on a trusted third party, comprising: sending, by an entity B, a message 1 comprising an authentication parameter of the entity B to an entity A; sending, by the entity A, a message 2 to a trusted third party TP, the message 2 comprising the authentication parameter of the entity B and an authentication parameter of the entity A; receiving, by the entity A, a message 3 sent from the trusted third party TP, a checking result is comprised in the message 3 which is obtained by checking whether the entities A and B are legal by the trusted third party TP on a basis of the message 2 ; and verifying the message 3 , by the entity A, so as to obtain a verification result of the entity B, sending a message 4 to the entity B, by the entity A, for causing the entity B to perform verification based on the message 4 and obtaining a verification result of the entity A.