【作者】 熊文；

【导师】 叶林；

【作者基本信息】 华中科技大学 ， 检测技术与自动化装置， 2006， 硕士

【摘要】 随着计算机科学技术及网络通信技术的飞速发展和Internet的快速普及,计算机网络的应用已遍及人类社会的各个领域。大量的数据通过网络进行交换,数据安全问题已经成为当今首要待解决的问题之一。第三代移动通信(3G)是一种基于QoS(Quality of Service服务质量)的高速宽带无线通信系统,其网络链路已满足大流量数据业务的需求,为用户实现了在线影音、移动电视等流媒体功能。然而,由于移动通信的空中链路具有开放性多径传输的固有特点,数据在无线传输路径中容易被监听而引起信息安全危机。本文通过分析移动通信系统中的数据安全度、安全需求度、及安全稳定性等重要参数,提出当用户对所传送的信息安全要求不同即用户的安全需求度不同,而系统所提供的安全度不变,将会造成用户的安全满足度随着安全需求度的变化而变化,从而导致系统的安全性能也随之波动,呈现及其不稳定状态的问题。本文提出使用加密算法来解决此种安全性能不稳定的问题。通过分析对称公钥和椭圆曲线密钥对移动通信信息安全的影响,从而提出一种基于RSA公钥密码体系的自适应安全度算法,根据用户的安全需求度的不同选择相对应的系统安全度,满足用户不同等级的安全需求,将无线通信网络构建成安全可控系统,从而均衡安全复杂度和安全满足度的波动特性,以稳定系统安全性能。本文通过一系列计算机仿真模拟实验,验证了移动通信安全度的高坡度脉冲形态特性及单参数自适应调节算法的可行性。更多还原

【Abstract】 With the rapid development of Computer Science and the popularization of Internet, the applications of computer network have come into lots of fields in human society. 3G is a high-speech broad-band Mobile Communication System based on QOS. Its network, which realized online-media, mobile TV, and other stream media, has satisfied the need of huge flux of data operation. However, Due to the characteristics of openness and mass transmissibility of the wireless communication’s aerial network, data in the wireless transmission route is prone to be monitored.In this Thesis, by analyzing the degree of data security and security requirements, the stability of the security and other important parameters, the author advances: with the constant system security degree, the user’s satisfaction shifts with the user’s security requirements which leads the fluctuation of the system security degree. The author discusses the influence of the symmetrical public-key and elliptic curvilinear private-key on the security of the mobile communication, and further advanced a self-adapting algorithm for the degree of the security based on the RSA public-key Cryptography. This algorithm could choose corresponding system security degree according to different user’s security requirement and could build up the mobile communication net into a safe controllable system in order to poise the fluctuation of the complexity and security needs.The Thesis validates the characteristics of high gradient pulse in mobile communication security and the feasibility of the algorithm which is controlled by one parameter by a series of computer emulation experiments.更多还原