In this lecture from Yale's Introduction to Medical Software, the instructor examines the importance of cybersecurity for developers building software used in clinical settings, where interconnected devices create new avenues of risk to patient safety and data integrity. The session covers why medical software requires security practices beyond those of typical consumer applications, given the potential consequences of a breach or system compromise in a healthcare environment. Students learn the categories of threats specific to connected medical devices and software, and how secure design principles should be built in from the start rather than added later. The lecture connects directly to the course's earlier privacy discussion, treating security and privacy as related but distinct disciplines.