【摘要】：P2P技術(shù)的出現(xiàn),使人們?cè)谫Y源共享領(lǐng)域創(chuàng)開了新紀(jì)元,用戶在享受服務(wù)的同時(shí),也面臨著隱私泄露的威脅。P2P網(wǎng)絡(luò)中最具代表性的是BitTorrent網(wǎng)絡(luò),主要用于資源文件的快速分發(fā)與共享,具有參與節(jié)點(diǎn)越多,分享速度越快的優(yōu)勢(shì),而深受廣大用戶的喜愛。然而,用戶在使用BitTorrent網(wǎng)絡(luò)進(jìn)行資源共享時(shí),難免會(huì)暴露自己的身份隱私信息,并且新加入網(wǎng)絡(luò)的節(jié)點(diǎn)由于缺乏身份認(rèn)證很容易進(jìn)入惡意網(wǎng)絡(luò)而造成隱私泄露。因此,基于人們對(duì)BitTorrent網(wǎng)絡(luò)安全性需求的提升,研究具有匿名性和身份認(rèn)證機(jī)制的安全通信機(jī)制,對(duì)于維護(hù)BitTorrent網(wǎng)絡(luò)性能、保護(hù)正常成員的利益以及促進(jìn)資源共享有著重要的意義�；贐itTorrent網(wǎng)絡(luò)存在身份認(rèn)證及用戶隱私信息暴露問題,本文結(jié)合一種高效的無證書群簽名方案,提出了具有安全性的BitTorrent網(wǎng)絡(luò)通信方案:GS-BT(group signature BitTorrent)系統(tǒng)。該方案的核心思想是,將共享同一個(gè)資源文件的用戶構(gòu)建一個(gè)群組,通過對(duì)資源片段進(jìn)行群簽名再發(fā)送給資源請(qǐng)求者,使得在同一個(gè)資源共享群組中的用戶不知道正在通信用戶的身份信息,而第三方攻擊者只能判斷出消息來自某個(gè)群組,而無法獲知具體是哪個(gè)用戶,從而保證了用戶在通信過程中的身份隱私。另外,在新成員加入群組時(shí)群管理員會(huì)通過驗(yàn)證新成員的身份和資源請(qǐng)求信息來判斷進(jìn)入哪個(gè)群組,因此能夠避免新節(jié)點(diǎn)進(jìn)入惡意的網(wǎng)絡(luò)群組。最后,為驗(yàn)證改進(jìn)后的方案可以有效的保護(hù)資源共享節(jié)點(diǎn)的身份隱私,對(duì)本文提出的方案進(jìn)行了安全性分析和證明。另外,通過與相關(guān)方案進(jìn)行效率比較,分析出本文提出的方案在性能和效率上具有明顯的優(yōu)勢(shì)。
[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(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN918

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本文編號(hào)：2271043