信任协商中信任证敏感属性的保护研究

多安全域环境下的访问控制是域间进行协作必须要解决的问题之一。交互主体间的陌生性以及共享资源的敏感性成为跨域建立信任关系的主要障碍。自动信任协商的提出提供了解决这一问题的新途径,它通过协作主体间信任证和访问控制策略的反复交互披露,在资源的请求者和提供者之间自动地建立起信任关系。在分析现有自动信任协商技术的基础上,针对信任协商中存在的证书敏感属性信息泄露的问题提出了改进的方案。该方案可有选择性地披露信任证的敏感属性,从而达到协商过程中减少敏感信息泄露和提高协商系统抗攻击能力的目的。     

XTNPL——基于XML的信任协商策略语言

在分析现有的基于信任管理和自动信任协商的策略语言基础上,介绍了1种基于XML的信任协商策略语言XTNPL.该语言很好地满足了信任管理和自动信任协商系统对策略语言的需求,尤其支持属性敏感程度和委托深度约束等.还介绍了适合这种语言的3种一致性验证器算法.满足了信任管理和自动信任协商的需求.通过实验证明,这3种算法效率较高,能够实际使用到信任协商系统中.     

一种基于博弈的自动信任协商模型

自动信任协商可解决跨安全域或非集中环境下陌生实体间的信任建立问题.本文提出一种信任建立博弈模型,根据博弈的定义以及自动信任协商现象的分析,对比发现,自动信任协商具有博弈的特点.因此,给出信任博弈相关定义,以及自动信任协商的博弈分析,还给出了信任协商博弈模型,解决了协商过程中最小证书集的求解问题.信任博弈模型既解决了陌生实体间信任建立问题,又能有效保护实体隐私,提高信任建立效率.     

一种基于代理的自动信任协商模型

为增强信任协商系统的实用性,提出一种基于代理的自动信任协商模型(ABAM).ABAM引进代理使协商过程免于人工干涉.同时,ABAM指定了元策略格式,使用这种格式灵活的信任凭证来满足访问控制策略要求,而不需披露数字证书的全部内容.此外,ABAM使用高强度的非对称函数加密传输消息,能防止消息遭受攻击.最后,模型中提出一种新的协商协议来指导协商进行.事例分析表明,ABAM是健全和合理的.与现有工作相比,ABAM在智能性、保密性和协商效率方面得到了改进.     

基于属性访问控制中的敏感属性保护研究

在象Internet这样的开放系统中,基于属性的访问控制(ABAC)机制比基于身份的访问控制机制更显优越性,但容易造成敏感属性的暴露问题。自动信任协商(ATN)技术正好能解决这一问题。本文分析和研究了ABAC ATN系统中如何使用属性确认策略和信任目标图协议建立资源请求者和资源提供商之间的信任关系,保护请求者的敏感属性和隐私,并讨论了相关的安全问题。     

移动Agent电子商务信任协商机制的研究

分析了现有的电子商务模式及其存在的弊端，介绍了移动Agent技术及其在电子商务中的应用，并讨论了移动Agent的关键技术——信任协商机制，最后阐述了移动Agent电子商务信任协商系统的设计过程，并指出了其不足与需要改进的地方。     

基于P2P的网格信任机制探讨

在分别对P2P信任机制和网格信任机制进行分析的基础上,提出了基于P2P的网格信任机制,并针对基于P2P的网格信任模型、自治域间自动信任协商机制、自治域内模糊信任机制等三部分进行了初步的研究,为下一步相关模型的确定及原型系统的研究奠定了良好的基础。     

基于自动协商的社交网用户隐私保护机制研究

针对社交网隐私安全问题,利用基于Agent的Pareto遗传算法构建社交网络隐私自动协商模型,实现隐私策略结果的多样性。实验表明,该模型根据用户隐私偏好和社交网隐私策略的不同协商可以产生不同的结果,实现了协商结果的多样性;该模型随着协商次数的增加,协商时间增加很小,在时间上具有可行性。各Agent获得的效用总值达到Pareto最优解,从而验证了该模型的有效性。     

一种基于信任管理技术的相关研究

本文针对目前分布式计算安全领域涉及到信任模型和信任管理技术研究中的不足,重点对信任模型的描述能力,信任关系量化的形式和影响信任关系的因素等进行研究.力求加大信任模型对信任关系的动态性、主观性和多属性建模的支持,改善信任评估的准确性和动态适应能力.     

交往主体人格观照下的人际信任关系建构

交际主体的人格特征是信任关系的重要维度,而学界对这一方面并未给予应有的重视。本文基于人际信任关系模型,结合语料,考察交往主体的人格特征如何动态影响人际信任关系建构。研究发现,主体的人格特征和信任倾向影响交际双方的信任关系协商策略,不仅左右信任方对被信任方的可信性评估,也是被信任方可资利用的资源要素,即针对信任方的主观特性在信任建构和修复过程中采取因应之道。本研究在凸显信任关系双向性的同时,强调交际主体人格特征这一情感维度对可信性判断、信任协商的作用,力求更为全面均衡地揭示信任关系建构的图景。     

商务谈判准备工作摭谈

随着我国经济的迅猛发展,各企业和单位遇到越来越多的国际商务谈判,在任何一个商务谈判中, 最重要的工作就是计划和准备工作。准备工作需要明确谈判内容、拟订最佳备选方案、了解双方的处境和拟订谈 判策略。     

商务谈判语言的特点及运用技巧

商务谈判的过程,其实就是谈判各方运用各种语言进行交流、沟通和磋商的过程。能否出色地运用语言的艺术是决定谈判成败的关键因素之一。因此,在商务谈判中了解谈判语言的特点,掌握谈判语言的运用技巧,做到＂四巧＂,对促成谈判的成功有重要作用。     

Mothers’ trust toward teachers in relation to teaching practices

This study examined the extent to which mothers’ trust toward the classroom teacher of their child in first grade is related to observed teaching practices in Finland and Estonia. Sixty-six teachers (32 in Finland, 34 in Estonia) were observed using the Early Childhood Classroom Observation Measure (ECCOM; Stipek & Byler, 2004). Mothers in Finland (n = 266) and in Estonia (n = 348) filled in questionnaires measuring their trust in their child's first grade teacher. The connection between mothers’ education, child gender, and classroom size in relation to mothers’ trust was also investigated. The results of multilevel modeling showed that mothers in both countries trusted more in teachers who were characterized by a higher level of child-centered teaching practices than teacher-directed teaching practices. Furthermore, Estonian mothers showed greater trust in more experienced teachers. The results emphasize the importance of teaching practices in promoting mothers’ trust in their child's teacher.     

A Study of Metadiscourse in Business English Negotiation

This thesis uses Hyland's(2008) interpersonal model of metadiscourse to collect and analyze the metadiscourse resources employed in BE negotiation. The author aims to analyze the distribution and the utilization of metadiscourse resources in BE negotiation and wishes this research would play a positive and useful role in coming up with better strategies for the efficient and successful BE negotiation.     

The Divergence of Culture in the English Business Negotiation

Business negotiation in external trade is a process of communication under different culture background; it is also an importantpart of communication bridging the culture divergence. In the process of English business negotiation, the divergence is the main factor that affects the negotiation. In this article, by analyzing the effect of English business negotiation by difference of culture, the author does there search of trying to find a way to take effective measure to make up the divergence and improve t...     

History-based trust negotiation model

Trust negotiation (TN) is an approach to establish trust between strangers through iterative disclosure of digital credentials. Speeding up subsequent negotiations between the same negotiators is a problem worth of research. This paper introduces the concept of visiting card, and presents a history-based trust negotiation (HBTN) model. HBTN creates an account for a counterpart at the first negotiation and records valid credentials that the counterpart disclosed during each trust negotiation in his historical information base (HIB). For the following negotiation, no more credentials need to be disclosed for both parties. HBTN speeds up subsequent negotiations between the entities that interact with each other frequently without impairing the privacy preservation.     

论委托人及其在信托关系中的法律地位

委托人是信托关系的设立者,是重要的信托当事人之一。关于委托人的概念及其在信托关系中的法律地位,各国法律有不同的规定,各国学者也有不同主张。笔者认为,在我国信托法中,委托人是指基于对受托人的信任将自己的财产权委托给受托人,形成信托财产,并要求受托人为受益人的利益或特定目的而管理、处分信托财产,自己仍然对管理和处分信托财产的行为享有约定或法定权利的信托当事人;委托人居于信托关系当事人地位,同时也是信托利害关系人。     

Facilitating professional learning communities in China: Do leadership practices and faculty trust matter?

This study examined the relationships between leadership practices, faculty trust, and professional learning communities in the context of mainland China. A total of 1,095 Chinese primary school teachers participated in a survey. The results showed that leadership practices had positive effects on faculty trust and professional learning communities. They further showed that trust in colleagues positively, whereas trust in the principal negatively, mediated the relationships between leadership practices and four components of professional learning communities. The negative mediation of trust in the principal may be attributed to Chinese cultural and contextual circumstances. The implications of these findings are discussed.