Importance of Logic Locking Attacks in Hardware Security

A rise in the number and devastating capability of hardware-based assaults has brought attention to the necessity of protecting the hardware root of trust alongside improvements in power, cost, performance, and reliability. The whole design of an integrated circuit can be concealed from a suspect foundry or end- user via a key-based circuit obfuscation or logic-locking approach. The method is based on introducing "key" input bits into the circuit to introduce ambiguity within the original circuit, rendering the circuit unreadable without the proper secret key. The present level of knowledge in this developing area is reviewed in this study, which also includes a threat model classification such as hardware Trojans, re verse engineering (RE) and side channel analysis. Moreover, the traditional and strong logic locking techniques and its efficiency in terms of area, power, delay is reviewed in hardware-based attacks.