旁路信息的分级泄露模型与安全性分析

Side-channel leakage model and security analysis

旁路攻击是一种新的密码分析方法,其利用了密码设备在运算时泄漏的信息破解密码系统。从信息泄露的一般性出发,提出了一种旁路信息分级泄露模型并给出其形式化描述。该模型将泄露信息分为算法级、指令级和逻辑门级泄漏。在此基础上,对不同泄露级别上采用的防御方法的安全性进行分析比较,最后对抗旁路攻击的安全芯片的设计给出建议。

Side-channel attack is a new cryptanalysis,and it utilizes the run-time leakages to extract the secret.From the point of information leakage,this paper poposed a three-level leakage model through a formal description.The proposed model included the algorithm-level leakage,instruction-level leakage and gate-level leakage.Based on this model,discussed diffe-rent countermeasures on each leakage level.And then gave a suggestion to build a secure cryptographic chip.