That is , there exist security barrier , tech barrier , legal barrier , economic barrier , facility barrier , telecom barrier , and so on . the first part of this thesis makes a profound analysis of those barriers and their causes 具体而言，我国发展电子商务的障碍表现为安全障碍、技术障碍、法制障碍、经济与费用障碍和基础设施及电信制度的障碍等方面，在本文的第一部分对这些障碍以及产生这些障碍的原因作了深入的分析。
In particular , we plan to investigate the following questions : how do the nature of these threats change over time , how effective are attackers at compromising services , and how well do existing security countermeasures provide a meaningful defense against these threats in practice 特别是，我们计划研究下面的问题：这些威胁的是怎样随着时间变化的，攻击者在危及服务安全的时候的有多高效，现有的安全措施在面临这样的威胁的时候能提供什么样的保护？
So under premise of the analysis of the existing security mechanisms of ipsec policy , the thesis introduces the concept of “ trust management ” into management of ipsec security policy . “ trust management ” adopts a unified “ security policy description language ( assertion ) ” not only resolving the question of how to describe the ipsec security policy , user identification and authorization will be more unified in the same time . “ trust management ” occurs in the ike consultation process 于是本文在研究了现有的安全策略机制的基础上,将“信任管理”的概念引入了ipsec的策略管理。 “信任管理”采用了一种统一的“安全策略描述语言(断言) ”不但解决了如何描述ipsec的安全策略的问题,更将用户的鉴定和授权统一起来。
All the security features of the existing 1 , 000 notes have been retained with some minor modifications : to provide more space for the inclusion of the new security features , the existing security metal thread of the boc note has been moved to the left and the number of its fluorescent denomination blocks visible only under ultraviolet light has been increased from one to two 新钞具备现有钞票的一切防伪特徵，但其中有部份已作出改动。为使有足够空间容纳新的防伪特徵，中国银行千元钞票的金属保安线移到钞票正面的左边，而萤光银码在紫外灯下才能显现则由一个增加至两个。
As the internet develops more and more quickly , the computer network is becoming more and more important in national informalization and economic development . it results , however , that the network becomes the attack target . and in another hand , most of the existing security products emphasize on the prevention of outside intrusion and the behavior of insiders is less considered 随着因特网的迅猛发展,网络对一个国家的信息化和经济发展起到越来越重要的作用,然而也正是因为这样,网络成为黑客攻击首当其冲的目标;另一方面,现有的安全产品多重视外部入侵的防范,对内部网络的监控行为考虑不周,电子科技大学网络安全基础实验室正是在这种背景下,开始进行网络安全方面的相关课题研究。
Papers by the following part : introduction ; first , our existing securities legislation and the provisions relating to false statements acts comments ; second , foreign securities markets false statement to the legislative acts of civil liability provisions ; third , china ' s stock market civil liability regime for acts of false statements 论文的内容由以下几个部分来组成:引言;一、我国现行证券立法有关虚假陈述行为的规定及评述;二、国外立法对证券市场虚假陈述行为民事赔偿责任的规定;三、我国证券市场虚假陈述行为民事责任制度的实现。
At the end of this thesis , the author develops a simple web services instance for explaining all the theories about secure web services . by utilizing the existing security technologies , cryptography operations , security specifications and xml parser , this web services example can ensure secure communication and fulfill the requirement of data integrity , data confidentiality , authentication and non - repudiation in secure web services 在文章的最后，利用在webservices环境下开发的一个简单服务，说明了如何利用现有的各种安全技术、密码操作、安全规范以及xml解析工具来保证webservices通信的安全性，使webservices通信满足数据机密性、数据完整性、身份认证以及不可否认性等的安全要求。
