一种基于Weil对的三方会话密钥协商协议

共享网络中用户之间的会话一般都是在公开的信道上进行通信的,其会话必须要有一个安全的会话密钥。本文提出了一种基于Weit对的三方会话密钥协商协议,通过对该协议的安全性进行分析,可以证明该会话密钥协商协议是安全的、可用的。     

一种改进的基于验证值的三方密钥交换协议

为防止服务器泄露攻击和口令猜测攻击,提出了一种基于验证值的三方密钥交换协议.该协议用于实现2个客户通过与第三方服务器间的交互协商出会话密钥的过程.协议中客户只需要记住自己的口令,而服务器端则存储与口令对应的验证值,客户与服务器之间的身份认证通过验证值来完成.对协议的安全分析结果表明,该协议能抵御很多已知的攻击,包括服务器泄漏攻击、口令猜测攻击、中间人攻击以及Denning-Sacco攻击等.对协议的效率评估表明该协议是高效的.     

两个无证书两方认证密钥协商协议分析

利用对无证书密钥协商协议常见的攻击方法,分析了两个无证书两方认证密钥协商协议的安全性.基于不同秘密信息泄露情况,分别对两个协议给出了密钥泄露伪装攻击、临时密钥泄露攻击等多种攻击方法.结果表明,两个协议都存在严重的安全缺陷.     

一种基于身份可认证的密钥协商协议的分析与改进

对Wang等提出的一种基于身份可认证的密钥协商协议进行协议安全性分析后发现,该协议存在安全性不足,如存在冗余信息、假冒攻击和临时秘密信息泄漏攻击。为解决这个问题,对该协议进行了改进,并对改进后协议的安全属性和运行效率进行了分析。分析结果表明,改进后的基于身份可认证的密钥协商协议满足已知所有的密钥协商协议的安全属性要求,且拥有可靠的效率。     

基于身份的双向认证及密钥协商协议

本文利用椭圆曲线上的双线性映射的特性,提出了一种基于身份的双向认证及密钥协商协议,该协议实现了通信双方的相互身份认证功能,使通信双方能确认对方的身份,同时还提供了密钥协商的功能,让通信双方能公平的协商会话密钥,经过分析,该协议能够抵抗重放攻击、中间人攻击和拒绝服务攻击,具有较高的安全性,此外,协议还具有较高的效率。     

基于ECC的认证协议及动态密钥管理方案

针对当前无线网络中认证和密钥管理存在的安全缺陷,通过对椭圆曲线密码体制(ECC)的研究,结合ECMOV密钥协商协议和IEEE 802.1X扩展认证协议EAP-TLS及X.509证书,提出了一种在无线局域网中基于ECC的双向认证协议及密钥管理方案.     

一种基于关联语义的密钥交换协议分析算法设计

安全协议的关联语义是刻画协议的核心性质,针对密钥交换协议关联特性,从分析主体认证关联语义、会话密钥关联语义、消息步骤间关联语义、消息内部关联语义和条件关联语义等方面来描述协议的内在语义,设计了基于关联语义密钥交换协议的分析模型及算法.对Ban-Yahalom Protocol协议进行了分析,指出该协议存在冒充第三方S生成会话密钥的安全隐患,但却未泄漏协议会话密钥.从实验结果来看,该分析方法对密钥交换协议进行关联语义验证分析是行之有效的.     

具有前向安全性的组密钥分发方案设计与实验分析

针对已有组密钥分发方案中的安全隐患,基于对称二元多项式提出一种无需可信第三方的具有前向安全性的组密钥分发方案。方案中,组内每对用户利用对称二元多项式的特征协商出一个对称密钥,实现组密钥的安全分发。每个用户维护一张通信记录表用于更新用户间的对称密钥,实现组密钥分发的前向安全性。针对方案的正确性、安全性和性能优势,给出了详细的证明和仿真实验分析。     

基于时间Petri网的MIKEY协议密钥分发研究

MIKEY协议是一种可应用于实时的、多媒体通信的密钥管理协议,密钥分发是密钥管理协议的一个重要内容.本文对MIKEY协议提供的三种密钥分发方式进行了基于时间Petri网的分析,并对其中公钥分发方式构建了中间人攻击的时间Petri网模型.     

IKE协议及安全性分析

因特网密钥交换协议IKE(Intemet Key Exchange)是一种混和密钥协议，它用于密钥的协商、交换和认证。在分析IKE协议工作原理的基础上，对可能遭受的拒绝服务攻击和中间人攻击做了进一步的探讨。最后对IKE的进一步研究提出了看法。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

团图为数的图中的闭团贯数

Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.