针对侧信道功率分析攻击的安全加密软件实现

Pei Luo, Liwei Zhang, Yunsi Fei, A. Ding
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引用次数: 12

摘要

侧信道攻击已经成为许多嵌入式密码系统的真正威胁。一种常用的算法对抗,随机屏蔽,会导致很大的执行延迟和资源开销。另一种对策,操作变换或排列,可以以最小的开销有效地减轻侧信道泄漏。在本文中,我们的目标是在密码算法中自动实现操作洗牌,以抵御侧信道功率分析攻击。我们设计了一个工具来检测源代码级语句之间的独立性,并设计了一个自动操作洗牌算法。我们在新的SHA3标准Keccak上测试了我们的算法。结果表明,该工具有效地实现了操作变换,显著减少了侧信道泄漏,因此可以指导自动安全加密软件实现对抗差分功率分析攻击。
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Towards secure cryptographic software implementation against side-channel power analysis attacks
Side-channel attacks have been a real threat against many embedded cryptographic systems. A commonly used algorithmic countermeasure, random masking, incurs large execution delay and resource overhead. The other countermeasure, operation shuffling or permutation, can mitigate side-channel leakage effectively with minimal overhead. In this paper, we target automatically implementing operation shuffling in cryptographic algorithms to resist against side-channel power analysis attacks. We design a tool to detect independence among statements at the source code level and devise an algorithm for automatic operation shuffling. We test our algorithm on the new SHA3 standard, Keccak. Results show that the tool effectively implements operation-shuffling to reduce the side-channel leakage significantly, and therefore can guide automatic secure cryptographic software implementations against differential power analysis attacks.
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