改进的SM4算法的选择明文DPA攻击

发布时间：2018-07-03 16:55

本文选题：分组密码算法 + 侧信道分析　；参考：《清华大学学报(自然科学版)》2017年11期

【摘要】：侧信道攻击,特别是差分功耗分析(differential power analysis,DPA)是对芯片中运行的分组密码算法进行安全性分析的主要手段之一。该文主要研究针对硬件实现的SM4算法的DPA攻击。合理地对明文进行选择,可以使SM4线性变换层有变化的输入比特尽可能少地影响输出比特,从而对硬件实现的SM4算法进行有效的侧信道攻击。通过分析线性变换层的比特关系,该文发现了选择明文模型下8个比特依赖关系。在此基础上,将这些比特依赖关系结合已有的比特关系,建立分析模型、更充分地利用轮输出的比特信息,对现有的SM4选择明文DPA攻击进行了改进。实验结果表明:该方法能有效提高SM4算法选择明文DPA攻击的成功率。
[Abstract]:Side channel attack, especially differential power analysis (differential power), is one of the main methods to analyze the security of the block cipher algorithm running in the chip. This paper focuses on the DPA attack against SM4 algorithm implemented in hardware. The reasonable selection of clear text can make the input bits of SM4 linear transform layer change as little as possible to affect the output bits, so that the SM4 algorithm implemented by hardware can be attacked effectively on the side channel. By analyzing the bit relation of linear transformation layer, eight bit dependencies are found in the selective plaintext model. On this basis, the existing SM4 selective plaintext DPA attack is improved by combining these bit dependencies with the existing bit relationships and establishing an analytical model, which makes full use of the bit information of the wheel output. Experimental results show that this method can effectively improve the success rate of SM4 algorithm in selecting clear text DPA attacks.
【作者单位】：中国信息安全测评中心;
【基金】：国家自然科学基金资助项目(61402536,61402252,61202493)
【分类号】：TN918.1

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