To defend against poisoning attacks and free-riding attacks conducted by malicious sensing terminals in crowd sensing-based collaborative spectrum sensing (CCSS). a novel audit game-based defense scheme was proposed. which combined the pre-deterrence and post-punishment mechanisms. Firstly. https://www.diegojavierfares.com/mega-sale-Boss-Kit-Suits-Ford-Falcon-EF-EL-1994-1996-XH-Ute-1997-BK183L-great-price/