Collaborative Admission Control Scheme for Group-Based P2P Contents Sharing Systems

In this paper, we proposed a user management scheme for Peer-to-Peer (P2P) contents sharing systems. The proposed scheme assumes the existence of peer groups which provide sensitive, confidential contents to the group members, and controls the membership through the collaboration among group members. As the key technique, we use the delegation of the task of qualification to few selected group members, and a voting mechanism based on the (n, t)-threshold cryptosystem. We implemented a prototype of the proposed scheme using JXTA framework, and evaluated the performance experimentally. The experimental result indicates that although the time required for the admission control is proportional to the group size and the threshold used in the threshold cryptosystem, we can significantly reduce it by executing it in parallel. We also demonstrate the availability of the scheme by applying it to the P2P live video streaming system.