Security issues refer to the challenges and concerns related to the protection of a nation's sovereignty, territorial integrity, and the safety of its citizens, especially in the context of international relations. These issues encompass military threats, political instability, and economic factors that can affect a country's ability to maintain stability and peace. In relation to the Helsinki Final Act, security issues were a central theme as they addressed the need for cooperation among European nations to ensure mutual security and prevent conflicts during the Cold War.