THREE-WAY HANDSHAKE PROTOCOL METHOD

摘要

A three-way handshake protocol method. The method comprises following steps: 1) an initiator sends message I to a responder; 2) the responder sends message 2 to the initiator after receiving message 1; 3) the initiator sends message 3 to the responder after receiving message 2; 4) the responder sends message 4 to the initiator after receiving message 3; 5) after the initiator receives message 4, the initiator and the responder respectively acquires corresponding Pair Temporal Key (PTK) and Key Confirmation Key (KCK). In the present invention, the initiator directly sends message 1 constructed by using a random number (I-Nonce) produced and stored in the last PTK negotiation process to the responder during updating PTK without encrypting the messages interacted in the three-way handshake, thereby the three-way handshake protocol not only has anti-replay function compared with three-step handshake of ECMA 386, but also provides better efficiency when resource is limited.