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发明公开
CN105790923A 密码算法抗功耗分析的实现方法及装置 无效 - 驳回

密码算法抗功耗分析的实现方法及装置
摘要：
本发明公开了一种密码算法抗功耗分析的实现方法和装置，其方法包括：将SM4密码算法中的模逆运算映射成对应的查找表，并进行保存；在SM4密码算法的S盒中添加预设的抗功耗分析逻辑，在SM4密码算法的轮函数中添加预设的计算逻辑，并根据查找表对数据进行加密操作。本发明解决了现有技术中SM4密码算法容易受到功耗分析的安全问题。实现了改善SM4密码算法中有限域模逆的运算效率，同时提高SM4密码算法的安全性。
摘要（英）：

The present invention discloses a cipher algorithm anti-power consumption analysis realization method and device. The method comprises the steps of mapping the modular inversion in a SM4 cipher algorithm into a corresponding lookup table, and saving; adding the preset anti-power consumption analysis logic in an S box of the SM4 cipher algorithm, adding the preset calculation logic in a round function of the SM4 cipher algorithm, and encrypting data according to the lookup table. According to the present invention, the safety problem in the prior art that the SM4 cipher algorithm can be carried out the power consumption analysis easily is solved, the operation efficiency of the finite field modular inversion in the SM4 cipher algorithm is improved, at the same time, the safety of the SM4 cipher algorithm is improved.

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