In this article I introduce the concept of the “dual-use security dilemma,” specifically through elaborating on two main aspects that shape this dilemma. First, inspired by traditional security scholarship, I focus on the spiral dynamics of actors responding to the insecurities raised by dual-use technologies that affect this type of dilemma. Second, I further develop a securitization reading of the traditional security dilemma, tracing how social constructions of insecurities and the justification of extraordinary measures affect the dynamics of the security dilemma.