Abstract: A group secure communication model of CSCW in the P2P network is proposed, which permits users to join and quit the system dynamically and freely, and provides secure, warranted and ordered communication between peers. User management and peer communication supply the necessary support for CSCW applications in the P2P network. Theoretical analysis can prove the persistence between the different peers in the group, and collaborative draw is used as an example to express the factual effect.

Key words: P2P, CSCW, group communication