This channel holds a set of videos that explain core aspects of internet security, including security protocols, attacks and defence. These videos are used for the Massive Open Online Course (MOOC) called "Learn Internet Security" (learnintsec) which is provided by the Internet Security and Privacy group of the University of Twente (UT), the Netherlands. The MOOC is offered twice a year, starting in September and in January; the URL is: learnintsec.org. For questions contact the MOOC coordinators: Anna Sperotto and Aiko Pras.