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一个安全和高效的白盒实施SM4的.
Xiaobo Hu1, Yanyan Yu1, Yinzi Tu1
1Beijing Smart-Chip Microelectronics Technology Co., Ltd., Beijing 102299, China.
Entropy (Basel, Switzerland)
|January 24, 2025
概括
本研究介绍了SM4密码的新型白盒设计,增强了对差分计算分析 (DCA) 攻击的安全性. 新方法有效地保护秘密密钥,同时保持高算法效率和低内存使用量.
科学领域:
- 密码学 密码学 密码学 密码学
- 计算机安全 计算机安全
- 信息理论 信息理论
背景情况:
- 不同计算分析 (DCA) 攻击利用内存痕迹从白盒实现中提取秘密密钥.
- 针对DCA的现有对策往往会损害算法效率.
- 安全和高效的白盒实现仍然是密码学中的一个重大挑战.
研究的目的:
- 开发一种SM4密码的新型白盒实现,能够抵抗微分计算分析 (DCA).
- 为了提高对钥匙提取的安全性,同时尽量减少对算法效率的影响.
- 与现有的DCA耐药方案相比,减少内存足迹.
主要方法:
- 通过使用表查找操作实现了Feistel密码SM4.
- 保护表输入/输出与随机亲属转换和非线性编码.
- 使用第四阶非线性编码来平衡效率和安全性.
- 采用随机序列来混合查询表访问,将内存数据与中间加密值脱.
主要成果:
- 实验结果表明,DCA无法获取秘密密钥.
- 理论分析证实了该方案对现有代数攻击的抵抗力.
- 拟议的设计实现了仅1.44 MB的内存需求,远远低于可比方案.
结论:
- 开发的SM4白盒设计有效地防止通过DCA提取钥匙.
- 该方法在加密安全性和算法效率之间提供了强大的平衡.
- 该方案为安全的白盒实现提供了一个内存高效的解决方案.
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