| CLEFIA算法的研究与改进 |
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| 引用本文： | 陈帮春,黄玉划,时阳阳. CLEFIA算法的研究与改进[J]. 微机发展, 2014, 0(12): 124-127 |
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| 作者姓名： | 陈帮春 黄玉划 时阳阳 |
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| 作者单位： | 南京航空航天大学计算机科学与技术学院,江苏南京210016 |
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| 基金项目： | 江苏省科技支撑计划（BE2013879）; 南京航空航天大学基本科研业务费专项科研项目（NS2010097） |
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| 摘 要： | CLEFIA算法是两种国际标准化的轻量级分组密码之一,它在资源受限环境下具有重要的应用价值。文中针对CLEFIA-128算法需要5轮才能基本实现雪崩效应、扩散效果并不明显的问题,以及每一轮中两个轮函数的设计方式导致的软、硬件实现效率降低的问题,从加密结构和轮函数上对该算法进行了改进。测试表明改进后的算法只要4轮就能基本实现雪崩效应,差分、线性和不可能差分分析表明改进后算法的安全性有了提高,而且算法的软、硬件实现效率也有了明显提高。
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| 关 键 词： | CLEFIA算法 改进 效率 安全 |
Research and Improvement of CLEFIA |
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| CHEN Bang-chun,HUANG Yu-hua,SHI Yang-yang. Research and Improvement of CLEFIA[J]. Microcomputer Development, 2014, 0(12): 124-127 |
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| Authors: | CHEN Bang-chun HUANG Yu-hua SHI Yang-yang |
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| Affiliation: | (College of Computer Science and Technology,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China) |
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| Abstract: | The CLEFIA is one of the two international standardized lightweight block cipher,which has important application value under the condition of resource constrain. In viewof the problems that CLEFIA- 128 need 5 round to realize the avalanche effect,and the diffusion effect is not obvious,and the design of round function in each round makes the efficiency of software and hardware lower,the CLEFIA- 128 is improved from the structure and round function. The test demonstrates the improved algorithm only need 4 rounds to realize the avalanche effect,its DC,LC and IDC indicates that the security is improved,while the software and hardware performance also increases a lot. |
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| Keywords: | CLEFIA improvement efficiency security |
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