Today's integrated circuits are vulnerable to hardware Trojans, which are malicious alterations to the circuit, either during design or fabrication. This article presents a classification of hardware Trojans and a survey of published techniques for Trojan detection.
N Mohankumar, Periasamy, R., Sivaraj, P., and Thakur, A., “Hardware Trojan Detection-A Survey”, 4th National Conference on Recent Trends in Communication Computation and Signal Processing (RTCSP-2013). Department of ECE, Amrita Vishwa Vidyapeetham, CBE, Coimbature, pp. 99-102, 2013.