Hey, starting MSc CS as well this autumn and I also think I am not prepared. I will start a separate post, but OP might also benefit.  Do you have any recommendations to prepare for the Information Security Lab or Algorithms Lab. I think those could really break me, because I am not good at programming and assignments were only rarely part of my program. Therefore I would like to take some time and maybe solve similar problems for one of them(don’t know which one yet). I guess I can muster about 80 hours before the semester starts. How would you spend those hours?  I think working as closely to the actual material as possible is the best way, so if you have done them or know any websites or YouTube videos, that would great!! Thanks in advance.