For state space obfuscation, describe possible attacks on an obfuscated design to reverse engineer it, considering both functional and structural attacks. Is it SAT attack resistant? Provide reasoning...

For state space obfuscation, describe possible attacks on an obfuscated design to reverse engineer it, considering both functional and structural attacks. Is it SAT attack resistant? Provide reasoning behind your answer.

1. Discuss how a certain hardware obfuscation method could make Trojan insertion difficult. Elaborate with respect to any of the well-known obfuscation methods.