In application of network technologies, the peer to peer technologies is becoming one of the hot spots in network research fields. In order to enhance the efficiency and effectiveness of the P2P network, a lot of architecture schemes for organizing the peers and the files in the P2P network are put forward which are mainly concentrated on the network characteristics of the peers and the file transmission. A P2P model based on the similarity of active peers is put forward. In the proposed model, the peers’ interests to the files are utilized to describe the similarities of the peers. By the similarities among the peers, the peer groups are clustered. Utilizing the representative clustering group, the interconnections among active peers are built according to the representative group selected by Hamming network.

The core principle of the operation of the non-touched IC card is the mechanism of the three times of identification. In the 16 sectors, the key and the control for storage and access of each sector are independent. With the key generated by the Crypto-1 privacy encryption algorithm, the location of the keys and the table of the control to storage and access are given beforehand. The Crypto-1 privacy encryption algorithm can be used to manage the information of the non-touched IC card by C# calling code in the managed execution environment or DLL calling code in the unmanaged execution environment. As a conclusion, the technical monopoly can be broke down by feasible methods.