If it can't work as is, and it can't work in a way that removes cheating (which the university feels invalidates the results for all participants) then it can't

If it can't work as is, and it can't work in a way that removes cheating (which the university feels invalidates the results for all participants) then it can't work. Getting a load of students to prepare and participate only to pull the rug out from under them isn't acceptable. That's a waste of their limited time and energy during a critical period of their lives.