【摘要】：隨著計算機(jī)技術(shù)的快速發(fā)展,互聯(lián)網(wǎng)時代的興起,如何在開放網(wǎng)絡(luò)中保證信息安全已經(jīng)成為一個研究領(lǐng)域,該領(lǐng)域的核心技術(shù)是密碼學(xué)。密鑰協(xié)商協(xié)議是參與者在一個不確定安全的網(wǎng)絡(luò)中,以信息交互的方式來共同產(chǎn)生一個保密的會話密鑰,隨后用對稱加密機(jī)制來保障通信數(shù)據(jù)的安全,是密碼學(xué)中許多的高級協(xié)議的構(gòu)成基礎(chǔ)。安全的密鑰協(xié)商協(xié)議的設(shè)計重點(diǎn)一般是從兩個方面進(jìn)行考慮:分別是安全性和協(xié)議的有效性。從安全性上來講,密鑰協(xié)商協(xié)議應(yīng)該要滿足的基本性質(zhì):已知會話密鑰安全、密鑰不可控制性、抵抗密鑰泄露攻擊、完美前向保密性、密鑰共享可知性。而從有效性上來講,則應(yīng)該考慮的是用戶的通信輪數(shù)與計算量的大小。根據(jù)參與的人數(shù),密鑰協(xié)商協(xié)議一般分為雙方、三方和多方密鑰協(xié)商協(xié)議。而本文主要是對多方密鑰協(xié)商協(xié)議進(jìn)行的研究。本文的研究成果如下:1、介紹了現(xiàn)有的多方密鑰協(xié)商協(xié)議,分析了其進(jìn)行一次協(xié)議所需要的通信復(fù)雜度和計算復(fù)雜度,并分析了其是否適應(yīng)成員的動態(tài)變化。2、提出了一種新的基于橢圓曲線的多方密鑰協(xié)商協(xié)議方案,新的方案是PKI認(rèn)證方式,使用安全單向函數(shù)而不使用雙線性對映射去構(gòu)造,并且對新的協(xié)議在安全性和效率方面進(jìn)行了分析。3、最后結(jié)合區(qū)塊鏈技術(shù),提出一種新的基于區(qū)塊鏈技術(shù)的多方密鑰協(xié)商協(xié)議方案。協(xié)議引入?yún)^(qū)塊鏈存儲,對第三方可信中心的依賴降低,第三方可信中心只是公私鑰的分發(fā),防止中心作惡,使得協(xié)議過程更加安全,透明。
[Abstract]:With the rapid development of computer technology and the rise of the Internet era, how to ensure information security in open networks has become a research field, and cryptography is the core technology in this field. The key agreement protocol is that the participants together generate a confidential session key in an uncertain and secure network by means of information exchange, and then use the symmetric encryption mechanism to ensure the security of the communication data. It is the basis of many advanced protocols in cryptography. The design of secure key agreement protocol generally focuses on two aspects: security and protocol effectiveness. In terms of security, the key agreement protocol should satisfy the basic properties: known session key security, key uncontrollability, resistance to key disclosure attacks, perfect forward confidentiality, key sharing knowability. In terms of effectiveness, the number of communication wheels and the amount of computation should be considered. According to the number of participants, the key agreement is generally divided into two parties, tripartite and multi-party key agreement protocol. In this paper, the research of multi-party key agreement protocol is mainly carried out. The research results of this paper are as follows: 1, the existing multi-party key agreement protocols are introduced, the communication complexity and computational complexity required for the primary protocol are analyzed, and whether it adapts to the dynamic changes of members is analyzed. In this paper, a new multi-party key agreement protocol scheme based on Elliptic Curve is proposed. The new scheme is PKI authentication, which uses secure one-way function instead of bilinear pair mapping. The security and efficiency of the new protocol are analyzed. 3. Finally, a new multi-party key agreement protocol scheme based on block chain technology is proposed. The protocol introduces block chain storage and reduces the dependence on the third party trusted center. The third party trusted center is only the distribution of the public and private key to prevent the center from doing evil and make the protocol process more secure and transparent.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN918.4

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