I am looking for an exam proctoring solution at my employer (an accredited online university). What are my best solutions? Any solution can be hacked (i.e. work

I am looking for an exam proctoring solution at my employer (an accredited online university). What are my best solutions? Any solution can be hacked (i.e. workaround it’s limitations). And without proctoring there is no guarantee students will not have someone else attempt the exam on their behalf or send the exam to someone to solve it for them. The only approach I see, but not favored by the Deans, is testing centers (prometric, etc.). Any suggestions?