Maybe, but in all these countries it happens that this happens with specific exams that are national and are very core to student's future. This does not have a

Maybe, but in all these countries it happens that this happens with specific exams that are national and are very core to student's future. This does not have an equivalent in most of the western countries (probably all?). I wonder if these exams were in the western countries, what would their approach to prevent mass cheating on national scale?