Entity identity validity verification method and apparatus in which multi-TTP participates

摘要

The present invention relates to an entity identity validity verification method and apparatus in which multi-TTP participates. In the method, entity B sends message 1 to entity A, entity A receives message 1, then sends message 2 to a trusted third party TTPA, and TTPA receives message 2. Send message 3 to TTPB, TTPB verifies the validity of entity B's identity after receiving message 3, sends message 4 to TTPA, and TTPA receives message 4 and then receives TTPB in message 4 And sending a message 5 to entity A, which includes verifying the validity of entity B's identity after receiving message 5. The present invention can implement identity validity verification between entities that trust different trusted third parties.