一种基于角色和应用上下文的移动网访问控制模型

访问控制是ITU X.805中定义的电信网八个安全维度之一.分析了移动核心网中数据访问的特点,提出了一种应用于移动通信网的访问控制模型基于角色和应用上下文的访问控制模型(R-ACBAC).该模型在基于角色的访问控制模型(RBAC)基础上,引入应用上下文和限定性约束等概念,对移动网访问控制中角色和权限的分配策略、触发机制、动态迁移等内容进行了详细的定义,为移动网中数据访问的检测与控制提供了参考.     

一种移动核心网用户数据库访问控制模型

移动核心网的用户数据库有其自身的特点,使用基于角色的访问控制(RBAC)模型能够实现权限和用户的分离,但其限定过于笼统,使得访问效率和安全性成为无法兼顾的问题.以角色访问控制模型和D-S证据理论为基础,利用数据库内在的审计功能,与配置自定义规则相结合,可实现对数据库访问的灵活控制,提高核心网数据库的安全性.     

基于角色的访问控制在房地产评估系统中的应用研究

以基于角色的访问控制模型(RBAC)为基础通过分析房地产评估系统用户和功能的特征,提出改进的RBAC模型,引入粗权限和细权限的思想对用户进行分类并且在授权管理中引入层层负责的管理模式,使访问控制的管理更加灵活方便。本文阐述了改进模型的设计及实现。该改进的RBAC模型在一个房地产评估系统的实际应用效果较好。     

电子军务系统中T-RBAC访问控制组件的设计与应用

电子军务信息系统虽然运行于相对安全的军队内联网中,但仍面临多种不安全因素。 针对其中破坏认证、破坏访问控制两种主要的威胁,提出结合部队编制、人员职务、角色分 工和业务工作流,以任务为中心进行认证与访问控制,从而保护业务系统操作和数据安全的 思想。利用公开密钥基础设施(PKI)和轻量级目录访问协议(LADP)设施实现了基于数字证书 的统一认证以及任务与角色结合的T-RBAC 访问控制组件。在司政后多种业务系统中的实际应用结果显示,该安全组件能够对用户访问 和操作权限进行严格、规范和灵活地控制,有效保证系统、工作流和数据的安全。     

蜜罐技术在移动网入侵检测中的应用

针对当前2G、2.5G移动核心网MAP协议的安全性缺陷,深入研究了蜜罐技术,将蜜罐关键技术与移动核心网入侵检测技术相结合,提出基于蜜罐系统的入侵检测模型.实验结果表明,蜜罐系统能够实现对入侵行为的追踪定位,进一步增强移动核心网用户信息安全防护能力.     

基于PLM访问控制模型研究

产品全生命周期管理系统PLM是以软件为基础,管理与产品相关的信息和所有与产品相关的过程的技术。因此,一个具有支持可定制的、开放的、易扩展的访问控制模型是实现企业信息化的首要任务。通过对目前常用的基于PLM访问控制模型进行了简要的分析和评价。     

基于SSL的身份认证和访问控制实现原理

SSL协议是网景公司(Netscape)推出的在网络传输层之上提供的一种基于浏览器和WEB服务器之间的安全连接技术。对于不同的系统架构,SSL协议实现身份认证和访问控制的原理不同。本文将分别就B/S和C/S的系统架构,来阐述SSL协议身份认证和访问控制的实现原理。     

大型信息系统访问控制模型SGFRBAC的设计与实现

本文针对大型信息系统访问控制管理的特点和要求,通过引入主体类、"一主体多用户"模式以及客体资源的域管理等对RBAC模型进行了优化,设计了基于GFAC框架和RBAC模型的访问权限控制模型SGFRBAC。并最终在ASP.NET Framework 2.0+Microsoft SQL2000 Server平台下实现了本模型。     

电子商务系统开发过程中的安全设计

安全设计是开发电子商务系统的关键问题之一。其核心在于后台的数据访问控制和前端Web页面的访问控制。本文在描述并分析了目前主流的基于角色的数据访问控制和基于ASP.Net技术的Web页面访问控制的基础上,提出了基于数据和Web页面双重访问控制的安全模型——DWACBS(MData and Web Access Control Based Security Model)。     

利用SPKI委托证书实现分布式访问控制

传统的访问控制技术已经无法满足大规模、跨域范围分布式应用的安全需要。本文从分析简单公钥基础设施（SPKI）委托证书满足分布式访问控制的几个基本特征出发，描述了证书的结构和五元组压缩规则，给出了采用委托证书的访问控制实现模型，最后简单讨论了委托证书链的搜索决定算法问题。     

Brown＇s Blossom in Britain-China

The overall strategic relationship between U.K. and China is ＂better than ever＂, China- Britain relations have maintained good momentum, with increased high-level exchanges and the reinforcement of strategic mutual trust, with more room for growth in the future.     

Challenge and Opportunity Go Hand in Hand——What Global Economic Agitation Brings to the China's Economy?

Domino effects of the global finance agitation As the origin of the subprime crisis,US financial institutions lost USS45 billion last year,accounted for over half of the total US,EU & Japan loss.Since January 15th,Chtigroup released its financial statement of the 4th quarter,showing a net deficit of USS9.83 billion,which marked the hisoric high of its quarterly deficit.     

Sinosteel：Extraordinary Moves in Industry Chess

Among the Fortune 500 firms,more and more images from China emerge out.On the 2008 list,Sinosteel Corporation,a landmark group of China industries quietly squeezes into the candidate line.As the largest steel service ＆ trade enterprise,its sales reached at RMB 111.24 billion,with a year-on-year increase of 83.03 percent,and the profit grew by 180.03 percent.On the Sinosteel 2008 Work Meeting,the president Huang Tianwen uttered,＂In the coming year,we will work for US$20 billion sales,and look forward to getting a position in Fortune 500 firms for ourselves.＂     

Walk Through Unusual Five Years—— An Exhibitor＇s Canton Fair Course

When the 103rd Canton Fair is approaching, an old friend of Canton Fair, Li Ying from Jiangsu prov-ince recollected his past five years＇ experiences to the grand trade meeting. Each year is special, with some unforgettable memories colored by the year.     

Jean-Pierre Duprieu： Willing to Be A Legate of Sino-French Business

Estaing, former French president, Valery Giscard d＇Estaing attended Sino-French Economic Seminar held in Shanghai in early April and said that the world center has shifted from the west to the east with many European and US companies entering into Asia, and China has the ability to play an important role in the world stage. Estaing, naming himself＂French Confucian＂, then said in Chinese that a cook-group includes 10 people in ancient Chinese soldier system and the cook is in charge of cooking for them. And people who belong to the same cook are actually ＂Partners＂.     

China''''s Stock Market Wave

The annual meeting of the World Economy Forum was held in Davos,a little town in Switzerland,on January 23rd to the 27th this year,with the theme"the Power fo Collaborative Innovation",over 2500 celebrates from ture political and cconomic circles of more than 80 countries and challengred logether to talk about the future of the global economy in 2008,A Forum for the problems and challenges that face whole world,some of the keywords which drew attention during the event were:the U.S.subprime mortgage crisis,soaring energy prices,the economic slowdown in the U.S.ermerging economic bodies,authority funds and the general unpredictable nature of the global economy.     

Trade Promotion from Neighborhood

If you are considering to trade with companies in Japan or expanding your .business to Japan, we are ready to help from the very beginning.＂ You will find this greeting at the first sight on the Chinese website of Japan External Trade Organization （JETRO）. JETRO has committed itself in delivering highly efficient and quality services to meet the demand of internal and external customs including Japanese companies, hence winning a good reputation in the international trade arena. In recent years, with its priority in advancing business cooperation in South and East Asia, JETRO has made great achievement in promoting trade between China and Japan. Therefore, China＇s Foreign Trade interviewed Mr. Yoichi Maine, Deputy Director General of JETRO BEIJING.     

Auto Parts Market Potential Coming into Surface

Looking at the increasingly fierce competition in the world auto market. global automobile manufacturing industry, taking Europe, the U.S. and Japan as representatives, is gradually forming a new type of relationship, mutual cooperation between whole vehicle and parts manufacturers. We can clearly see that auto parts manufacturers have become independent from the whole vehicle manufacturing companies, which means that the former structure of auto industry has greatly changed, and a new relationship,     

Public Financial Expenditure——A Reflection of the Livelihood Improvement

In recent years.China's public finance put social construction high on the agenda and attaches more importance on livelihood insurance and improvement.The 2003-2007 public financial expenditure reflects a fact that the government isputting more emphasis on livelihood andissues concerning the people.     

Voices from the MPC and CPPCC

"Crucial for economic growth.energy utilization has its role in all economic sectors and every aspect of people's daily life.Now we are in dire need of a new profession,namely energy manager.We not only need to have passion and responsibility,but also a scientific approach to conserve energy and cut emissions.APpropriate legislation should be in place.and a special profession should be introduced to ensure the implementation of these laws and regulations."