The idea is really nice. If I understand correctly he let's the students computer do the grading (and not the server, who he can trust a lot more), but that is

The idea is really nice. If I understand correctly he let's the students computer do the grading (and not the server, who he can trust a lot more), but that is just a small security design problem. Allover using a program to solve the problems of a CS class is quite smart and I wonder (since I started to study CS) why not more people do that.