一种基于时序型硬件木马的IP版权保护结构  

A Sequential Hardware Trojan-based Framework for IP Copyright Protection

作　　者：冯紫竹[1] 赵毅强[1] 刘长龙[2] 

机构地区：[1]天津大学电子信息工程学院,天津300072 [2]中国电子科技集团公司第五十四研究所,石家庄050081

出　　处：《计算机工程》2014年第9期19-22,共4页Computer Engineering

基　　金：天津市自然科学基金资助重点项目(12JCZDJC20500)

摘　　要：随着IP核在SoC设计中的大量使用,其版权问题得到广泛关注,通过植入硬件木马实现IP核的版权保护是一个新的研究方向。针对其中植入木马激活时间短的问题,提出一种改进结构,使IP核评估版本满足有效期长度的要求。将时序型硬件木马植入原始电路状态机的冗余状态中,选取电路中部分节点构成的序列作为木马状态的转移条件,木马激活后影响电路的正常功能,使IP核的使用受到限制。仿真结果表明,通过合理调整状态数量及序列长度,能够在优化电路面积的同时有效延长木马的激活时间,当状态数为3、序列长度为4时,该方法能够在电路面积减少0.123%的基础上使激活时间提高约120倍。With the widespread use of Intellectual Property（IP）in System-on-Chip（SoC）design,protection of hardware IP cores against piracy during evaluation becomes a major concern. Embedding a sequential hardware Trojan inside an IP is a new solution to protect the evaluation version of hardware IP. This paper proposes an advanced framework to lengthen the Trojan＇s activation time which is the decisive factor of the expiry date of an IP. The sequential Trojan is inserted in the unused states of a Finite State Machine（FSM）in the target circuit and some rare nodes making up a sequence can be chosen as Trojan trigger conditions,and the normal function of the IP core is disturbed when the Trojan is activated. Simulation results demonstrate that the improved framework can effectively lengthen the activation time of the inserted Trojan by120 times and simultaneously reduce the design overhead by0.123% when reasonably choosing the number of states as3 and the length of sequence as4.

关 键 词：IP核 硬件木马 激活时间 有效期 状态机 

分 类 号：TP407[自动化与计算机技术]