一种基于密钥的硬件木马预防方法研究

摘要

硬件木马因其巨大的潜在威胁而受到学术界和工业界越来越广泛的关注。当前主流的集成电路设计制作的各个环节都存在着植入硬件木马的可能性。基于硬件木马的插入设计考虑，提出一种基于密钥的硬件木马预防方法。通过在电路中增加初始序列（密钥）、迷惑电路和冗余电路，隐藏有正确功能的原始电路，以预防在设计及后续环节中可能被植入的硬件木马。基于大量测试矢量激励的实验表明，优化的预防电路在没有太多的额外的电路资源开销的情况下能有效保护电路不被硬件木马破坏，而且不影响正常的功能。%Hardware Trojans draw more and more attention of the academia and industrial community because of its huge potential threat in recent years. Trojans may be inserted in all the current main IC design process. Considering the Trojans insert⁃ing mechanism,a hardware Trojan prevention method based on secret keys is proposed,which is realized by adding initial se⁃quence (secret keys),confusing circuit and redundant circuit,and hiding the original circuit with correct function. The result based on a large number of test vectors shows that the optimized prevention circuit can effectively prevent the normal circuit to be attacked by the Trojans in the case of not spending more extra circuit resources.