改进的AES算法在智慧住区门户中的应用与实现  

Application and Implementation of Improved AES Algorithm in Smart Residential Areas Web Portal

作　　者：谢秀颖[1,2] 王敏[2] 王少林[1,2] 唐威 XIE Xiu-Ying WANG Min WANG Shao-Lin TANG Wei(School of Information and Electrical Engineering, Shandong Jianzhu University, Jinan 250101, China Shandong Provincial Key Laboratory of Intelligent Buildings Technology, Shandong Jianzhu University, Jinan 250101, China)

机构地区：[1]山东建筑大学信息与电气工程学院,济南250101 [2]山东建筑大学山东省智能建筑技术重点实验室,济南250101

出　　处：《计算机系统应用》2017年第10期290-295,共6页Computer Systems & Applications

基　　金：山东省墙材革新与建筑节能科研开发项目(QG021);2016年度山东省省级建筑节能与绿色建筑示范项目(第二批)(鲁建节科函[2016]22号)

摘　　要：智慧住区信息门户系统中包含着大量及涉及居民生命财产安全的敏感数据,为了保证这些数据的保密性,采用优化的AES加密算法对这些数据进行加密,在保证数据安全的同时,减少了加密时间,从而减少了通信延时,提高了系统的性能.分析了高级加密标准AES的原理和加解密流程,针对AES算法加解密过程耗时相差较大的问题,在列混合和逆列混合运算时采用有限域GF(2^8)上最简形式的矩阵,减少了解密过程的运算量,使加解密过程耗时差减少了.在此基础上对加解密过程进行了合并优化,在保证加密速度的同时,减少了算法所占用的存储空间.在Visual Studio 2010平台上,使用C语言实现了几种AES优化算法在智能家居中的应用,结果显示,所提的优化算法有较高的执行效率,并占较少的存储空间.Smart residential areas information portal system contains a large number of sensitive data related to the residential life and property security. In order to ensure the confidentiality of the data, optimized AES encryption algorithm is used to encrypt the data to reduce the encryption time, thereby reducing the communication time delay, which improves the performance of the system a lot. The principle, as well as the flow of encryption and decryption of AES algorithm, is analyzed in the following sections. In order to overcome the problem that the time used in decryption is longer than in encryption, a simplest matrix in the Galois field GF（2^8） is going to be adopted in Mix Column and inverse Mix Column operation to reduce the computation and time consumption in decryption. And then based on this, the steps in encryption and decryption process is merged and optimized in some degree, reducing the storage space, at the same time it can keep the execution efficiency. In the Visual Studio 2010 platform, several optimized AES algorithms are implemented in intelligent Home by adopting C language. It shows that the proposed optimized algorithm has higher efficiency and occupies less storage space.

关 键 词：智慧住区 AES算法 加解密时差 最简矩阵 合并优化 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TU855[自动化与计算机技术—计算机科学与技术]