Attacks on Logic Locking Obfuscation Techniques

Logic Locking is a relatively new obfuscation technique that is at the forefront of preventing IP theft, piracy, overproduction, and counterfeiting of chips made in contracted foundries. As logic locking develops and new gate insertion techniques are created, their resilience to attacks must be evaluated to know their true effectiveness. In this paper, a variety of logic locking attack methods are reviewed, with their strengths, weaknesses, limitations, and uses being analyzed. Some of the most capable logic locking attacks to date are included: such as Novel Bypass Attack, Functional Analysis Attacks on Logic Locking (FALL), Structural-Functional Attack (SURF), etc.