METHOD, SYSTEM AND DEVICE FOR GENERATING GROUP KEY

摘要

A method, system and device for generating a group key in the field of the network communication. The method includes: group members select DH secret values and generate DH public values, an organizer generates an intermediate message and broadcasts the DH public values and intermediate message, the group members generate the group key according to the DH secret value selected by the organizer and the DH public values of the other group members except the organizer. The system includes: the communication device for the organizer and the communication devices for the members. The device includes: a system parameter selecting module, DH publicvalue generating and broadcasting module, intermediate message generating and broadcasting module, and organizer group key generating module; or a system parameter selecting module, DH public value generating and broadcasting module, and member group key generating module. Wherein the members form a star structure, negotiate and generate the group key based on the public key cryptographic technique on the elliptic curves.