Method, system and equipment for negotiating security association (SA) in internet protocol version 6 (IPv6) network

The embodiment of the invention discloses a method, a system and equipment for negotiating security association (SA) in an internet protocol version 6 (IPv6) network, wherein the method for negotiating SA in the IPv6 network is implemented after the SA is generated through exchanging two information by an initiator and a responder. Because the information interaction process in the embodiment of the invention is greatly simplified compared with the process of setting up the SA on the basis of internet key exchange (IKE), the SA negotiation process can be more rapid and convenient. In addition, because cryptographically generated address (CGA) parameters are added in the information by using the embodiment of the invention, the CGA can be verified and the invader can not counterfeit the address of other people.