基于群簽名的P2P網絡匿名通信方法研究
[Abstract]:The emergence of P2P technology has opened a new era in the field of resource sharing. Users are also facing the threat of privacy disclosure while enjoying services. P2P network is the most representative of the BitTorrent network. It is mainly used for the quick distribution and sharing of resource files. It has the advantage of more participating nodes and faster sharing speed, and is loved by the majority of users. However, when users use BitTorrent network to share resources, it is inevitable to expose their identity privacy information, and the new network nodes can easily enter malicious network because of lack of identity authentication, resulting in privacy disclosure. Therefore, based on the improvement of BitTorrent network security requirements, it is of great significance to study the secure communication mechanism with anonymity and identity authentication mechanism for maintaining the performance of BitTorrent network, protecting the interests of normal members and promoting resource sharing. Based on the problems of identity authentication and user privacy information exposure in BitTorrent networks, a secure BitTorrent network communication scheme, GS-BT (group signature BitTorrent) system, is proposed in this paper, which combines an efficient certification-free group signature scheme. The core idea of the scheme is to construct a group of users who share the same resource file, sign the resource fragment and send it to the resource requester. So that the user in the same resource-sharing group does not know the identity of the user in the communication, while the third-party attacker can only determine the message from a group without knowing which user it is. Thus, the user's identity privacy in the communication process is guaranteed. In addition, when the new members join the group, the group administrator will verify the identity of the new member and resource request information to determine which group to enter, so that the new node can avoid entering a malicious network group. Finally, in order to verify that the improved scheme can effectively protect the identity privacy of resource sharing nodes, the security analysis and proof of the proposed scheme are carried out. In addition, by comparing the efficiency of the proposed scheme with the related schemes, it is found that the proposed scheme has obvious advantages in performance and efficiency.
【學位授予單位】:蘭州理工大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TN918
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