Fault attack hardware Trojan detection method based on ring oscillator

Abstract

Recently proposed common hardware Trojan detection methods can detect wide range of Trojan types, however, there is no explicit detection method for specific Trojan types. These types of Trojan lead to low detection efficiency due to variety of categories and complex features. Keeping in view the special characteristics of Fault Attack Hardware Trojan (FAHT), a method for detection of FAHT is proposed in this letter. Proposed methodology uses ring Oscillator detection circuit that can detect extra logic gate on original cipher circuit where each byte is not required to be injected into the circuit. The experiments show that when the Trojan circuit of area 0.0495% is implanted into the original AES circuit, the detection method in this paper can detect them successfully. In addition, the proposed detection approach has high flexibility to implement in other cipher circuit.