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Implementation of the security of its clients in the of P2P shared storage system

Author: YeXin
Tutor: QinZhiGuang
School: University of Electronic Science and Technology
Course: Information and Communication Engineering
Keywords: Peer-to-peer network Security Access Control Authenticate
CLC: TP393.08
Type: Master's thesis
Year: 2008
Downloads: 101
Quote: 1
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Abstract


Over the past few years, the global Internet to flourish, peer-to-peer (P2P: Peer to Peer) network also will be rapid development. Distributed memory sharing technology as an important branch of the P2P applications, it can take advantage of the network is idle resources to overcome the bottleneck of traditional C / S mode, you can take full advantage of the client's computer resources to work together in order to achieve the whole mass of information shared query, access and storage. However, P2P networks have a strong autonomy and arbitrariness, all nodes can freely join such other factors and the withdrawal of the anonymous exchange of information between the network and the node, P2P systems are making security difficult to be guaranteed. How to provide appropriate security of distributed storage system based on P2P networks, so that the system can meet the high security demand, has become a pressing problem. According to the special needs of some special application environment of distributed storage introduces a secure shared P2P storage system, this paper focuses on the implementation process of the client. This paper proposed a two-tier P2P network structure through improved hybrid P2P network structure. In this structure, the upper and lower levels of nodes to form a hybrid between the P2P network, the management of the upper node to the lower node. Between the upper node in the same layer nodes Gnutella protocol as the basis for interconnection and routing the lower nodes based BitTorrent protocol to achieve interconnection and resource sharing between the nodes. As a result, the system can be based on the actual situation for client C / S mode and class BT mode two download methods, so good to ease the bottleneck problem only as a storage system using C / S mode download to improve the performance of the system and download efficiency. Basis, in the analysis of the actual security requirements of a distributed storage system, in this article from the confidentiality, integrity, availability, three aspects of system security design. Comprehensive in-depth overview of the current access control technology, combined with the characteristics of P2P networks and P2P storage sharing system actual demand of high confidentiality, research privacy policy BLP model (Bell-LaPadula), based on combined customized for the system based on the level of access control model of a compliant access control model to ensure the confidentiality of the system, from the flow of information. Moreover, in order to satisfy the system of higher security requirements, the design of a simple, effective and easy to implement a one-way node authentication protocol; improved and files stored procedure, the stored procedure will not use the copy of the file itself, and file after processing file fragmentation uniform storage at each node in the network, so that makes file storage to achieve a true sense of the distributed security storage.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Computer Network Security
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