Chapter 12 focuses on aviation security in Malaysia, a country that has suffered some of the worst episodes related to aviation security in the current decade. The chapter begins by stressing the relevance that the tragic events of 2014 have had on the perception of security by the Malaysian airline and by the general public. It also provides a quantitative estimate of the loss in income in the aftermath of these episodes. It then discusses the Malaysian civil aviation industry and provides a thorough analysis of the two episodes that occurred in 2014. The chapter then considers air transport security in Malaysia with special attention to the role, functions and organization of its governing body, the Department of Civil Aviation. It also considers the main challenges that the Department confronts including aircraft flight tracking and conflict zone risk mitigation.