During state space obfuscation, what would be the minimum clock cycle for applying a 256-bit key for an obfuscated IC with 18 primary inputs? Assume only 16 of the primary inputs can be used for applying the obfuscation key.
1. What is a possible way for the attacker to identify the inserted FSM that applies the obfuscation key in FSM-based obfuscation?
2. Discuss the differences between combinational and sequential obfuscation.