Hardware Security for IC Piracy: Logic Locking Past, Present and Opportunity

Logic locking is an emerging technique for securing the IP from hardware security threats at the IC manufacturing supply chain. Over a decade, the research studies have investigated the metrics to assess the efficacy, the impact of locking at different levels of abstraction, threat model definition, resiliency against physical attacks and tampering. In this survey paper, we classify the existing defences and attacks to capture benefits from the logic locking techniques for IP protection. This survey paper serves as a guide to quickly navigate and identify the state-of-the-art studies on logic locking techniques.