一种AES算法加密传输系统的设计与实现
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摘要
针对高级加密标准AES在硬件平台上用软件编程实现的运算效率问题,提出了一种AES加密算法的T盒设计方法。根据AES加密算法的特点,将在轮变换中从字节替换后的输出、经过行移位、到列混淆这一不受外部影响的运算过程合并,得到了8 bit输入而32 bit输出的查找表即T盒。通过在一款基于ARM处理器的小型传输系统平台上,用C语言编程分别实现传统顺序加密和T盒设计两种方法,实验表明T盒设计方法的运算效率远高于传统顺序加密方法。
A method of T-box for AES(advanced encryption standard)is proposed,which improving the operational efficiency in doing encryption of software based on the platform of hardware. According to the characteristics of AES,the operation process,which begins with the output of Sub-Bytes and ends with Mix-Columns through Shift-Rows,which is not influenced by the external effect,is merged in the wheel transformation,and the table,which has the input of 8 bit and the output of 32 bit,which is called Tbox,is obtained. In a small transmission system based on ARM(advanced RISC machines),two methods of traditional encryption and T-box are realized by programming with the language called C. The experiment shows that the method of T-box is far higher efficiency than the method of traditional encryption.
A method of T-box for AES(advanced encryption standard)is proposed,which improving the operational efficiency in doing encryption of software based on the platform of hardware. According to the characteristics of AES,the operation process,which begins with the output of Sub-Bytes and ends with Mix-Columns through Shift-Rows,which is not influenced by the external effect,is merged in the wheel transformation,and the table,which has the input of 8 bit and the output of 32 bit,which is called Tbox,is obtained. In a small transmission system based on ARM(advanced RISC machines),two methods of traditional encryption and T-box are realized by programming with the language called C. The experiment shows that the method of T-box is far higher efficiency than the method of traditional encryption.
引文
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[9]吴兆芝.ARM平台多进程微内核嵌入式操作系统Ymodem下载功能设计与实现[J].南京晓庄学院学报,2013(3):33-36.
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[14]Tromer E,Osvik D A,Shamir A. Efficient cacheattacks on AES and countermeasures[J]. Journal ofCryptology,2010,23(1):37-71.
[15]杨小东,王毅. AES密钥扩展新方法[J].微电子学与计算机,2012(1):102-104.
[16]刘金平.基于Keil for ARM开发环境的可重入中断实现[J].电脑知识与技术,2012(12):2756-2758.
[17]王战红.计算机网络安全中数据加密技术的应用对策[J].现代电子技术,2017(11):88-90.
[18]丁闯,陆俊,李映雪.基于AES算法的配电网多业务分级的安全策略研究[J].电力信息与通信技术,2018(6):19-25.