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手机的普及使得个人信息安全问题受到广泛关注,其中手机短信息的安全性尤为重要.本文致力于设计实现手机短信息加密与安全传输的硬件系统,采用混沌A5/1混合算法,提出一种基于现场可编程门阵列(FPGA)的手机短信息加密系统设计方案.使用由Logistic混沌序列做初始密钥而改进的A5/1混合算法作为加密算法,分析其伪随机性并证明圆周相关与线性相关的关系;采用SIM300模块设计实现手机功能,仿真普通手机短信息和加密短信息的传输;开发一套软件测试平台,可以在计算机上呈现硬件系统的测试结果.经测试表明,本文提出并实现的硬件系统可以加密手机短信息并保证其正常传输,从而提高了手机短信息的安全性.
The popularization of mobile phone makes the personal information security problem received widespread attention, and the security of mobile short message is especially important.This paper is devoted to designing and implementing the hardware system of short message encryption and secure transmission of mobile phone, using the hybrid algorithm of chaos A5 / 1, Field programmable gate array (FPGA) mobile phone short message encryption system design scheme.Using the A5 / 1 hybrid algorithm improved by the Logistic chaotic sequence as the initial key as the encryption algorithm, the pseudo-randomness is analyzed and the correlation between the circle and the linear correlation is proved Of the relationship between the use of SIM300 module design and implementation of mobile phone functions, simulation of ordinary mobile phone text messages and encrypted short message transmission; development of a software test platform that can be presented on the computer hardware system test results.Experiments show that the paper proposed and implemented Hardware system can encrypt mobile phone text messages and ensure its normal transmission, thereby enhancing the security of mobile phone text messages.