基于安全授权密钥的增强型逻辑加密算法  

Enhanced logic encryption algorithm based on secure authorization key

作　　者：赵毅强 宋凯悦[1,2] 何家骥 马浩诚 ZHAO Yiqiang;SONG Kaiyue;HE Jiaji;MA Haocheng(School of Microelectronics,Tianjin University,Tianjin 300072,China;Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学微电子学院,天津300072 [2]天津大学天津市成像与感知微电子技术重点实验室,天津300072

出　　处：《华中科技大学学报（自然科学版）》2020年第5期1-6,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金重点资助项目(61832018)。

摘　　要：针对目前集成电路(IC)伪造和知识产权(IP)盗窃等硬件安全威胁,提出一种基于安全授权密钥的增强型逻辑加密算法.该算法通过稀有节点分析方法定位"密钥门"插入的位置,由密钥逻辑模块生成的全相关的次级密钥作为密钥门的输入;通过植入密钥安全对来抵抗攻击者利用路径敏感攻击对密钥进行破解,可增强逻辑加密方法的鲁棒性,进而提高电路的安全性.以ISCAS'85和ISCAS'89的基准电路作为研究对象进行仿真验证,结果表明:初级密钥和次级密钥的相关性达到了100%,错误密钥和正确密钥的输出损坏率达到了48%,有效地保证了授权密钥不能被破解;在选择合理密钥规模的情况下,电路额外增加的面积可控制在10%以下.Considering the hardware security threats such as integrated circuit(IC)counterfeiting and intellectual property(IP)theft,an enhanced logic encryption algorithm with a secure authorization key was proposed.The algorithm located the insertion position of the"key-gates"by utilizing the rare node analysis.The completely relevant secondary keys were generated through the logic dependency block,which were used as the input of the key-gates.The security pairwise key-gates were inserted to prevent attackers from cracking the secret keys using path sensitization attacks,which effectively enhanced the robustness of the logic encryption and the security of the circuit.The benchmark circuits of ISCAS’85 and ISCAS’89 were exploited to carry out the simulation and verification.Results show that the correlation between the primary keys and the secondary keys can reach 100%,and the output corruption when applying the wrong keys and the correct keys can reach 48%.These two significant items effectively guarantee that the authorization keys cannot be cracked.The additional area of the circuits can be controlled to less than 10%when selecting reasonable key sizes.

关 键 词：逻辑加密 授权密钥 全相关 稀有节点 密钥门 路径敏感攻击 输出损坏率 

分 类 号：TN47[电子电信—微电子学与固体电子学]