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    于晓丽, 吴文玲, 李艳俊. 低轮MIBS分组密码的积分分析[J]. 计算机研究与发展, 2013, 50(10): 2117-2125.
    引用本文: 于晓丽, 吴文玲, 李艳俊. 低轮MIBS分组密码的积分分析[J]. 计算机研究与发展, 2013, 50(10): 2117-2125.
    Yu Xiaoli, Wu Wenling, Li Yanjun. Integral Attack of Reduced-Round MIBS Block Cipher[J]. Journal of Computer Research and Development, 2013, 50(10): 2117-2125.
    Citation: Yu Xiaoli, Wu Wenling, Li Yanjun. Integral Attack of Reduced-Round MIBS Block Cipher[J]. Journal of Computer Research and Development, 2013, 50(10): 2117-2125.

    低轮MIBS分组密码的积分分析

    Integral Attack of Reduced-Round MIBS Block Cipher

    • 摘要: 分组密码算法MIBS是轻量级密码算法,其设计目标是适用于RFID和传感等资源受限的环境.对其进行了积分分析,给出了一个5轮的积分区分器,并利用高阶积分的技术将该5轮区分器向前扩展了3轮.据此对MIBS进行了8轮、9轮和10轮的攻击.8轮攻击数据复杂度为29.6,时间复杂度为235.6次加密; 9轮的攻击数据复杂度为237.6,时间复杂度为240次加密;10轮的攻击数据复杂度为261.6,时间复杂度为240次加密.同时该攻击结果适用于MIBS-64和MIBS-80两个版本.研究结果表明,这种所使用的高阶积分技术对于Feistel-SP结构的分组密码普遍适用.

       

      Abstract: MIBS is a lightweight block cipher aimed at constrained resources such as RFID tags and sensor networks, which was proposed in CANS2009, by Izadi M. I. et al. There have been a few security analysis results about MIBS, such as differential analysis and linear analysis on reduced rounds of MIBS. In this paper, we give an integral attack on reduced rounds of MIBS. Firstly, a 5-round integral distinguisher of MIBS is given by considering the special property of round function. Secondly, we use the higher-order integral technology to extend the 5-round integral distinguisher by another 3-round which helps us get a better integral attack on MIBS. Finally, we attack 8-round, 9-round and 10-round MIBS using these distinguishers. Furthermore, we use partial sum technique to reduce the time complexity of the integral attack. We attack 8-round MIBS with the data complexity of 29.6 and time complexity of 235.6encryptions, attack 9-round MIBS with the data complexity of 237.6 and time complexity of 240encryptions, and attack 10-round MIBS with the data complexity of 261.6 and time complexity of 240encryptions. Moreover, the results of this paper can be applied to both MIBS-64 and MIBS-80. Finally, the higher-order integral technology can also be applied to other Feistel-SP type block cipher, which can improve the results of integral attacks.

       

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