A good answer for this problem is just to produce the sort of questions that are fit to open book exams (I.e. resistant to access to materials) and give a diffe

A good answer for this problem is just to produce the sort of questions that are fit to open book exams (I.e. resistant to access to materials) and give a different question to each student. It can be done by varying a bit the parameters of the question for each student and I am sure AI based solutions for producing a lot of questions are possible