Lecture
This lecture delves into the security and privacy issues surrounding the Swiss COVID contact tracing app, focusing on the technological solutions for contact tracing, the principles behind encounter notifications, and the potential threats such as replay attacks and time manipulation. The instructor explains the challenges faced in ensuring privacy and security, including the risks of fake notifications, privacy violations through Bluetooth technology, and the possibility of time-based attacks. The lecture also discusses the limitations of the current technology, the need for more robust protocols, and the implications of different contact tracing approaches used in various countries.