Assessments being delivered and taken in Digital form an online is quite common. However, when High stakes tests/real exams have to be delivered online to personal devices, a lot more factors come into play: Security, minimise, mitigate or entirely outdo cheating.
At this time of crisis, learning, testing, including test prep cannot stop. In fact the requirement of end-to-end secure testing becomes a must have. This implies authentication of each test taker, using lockdown browsers/secure browsers at the test-taker end, proctoring online tests (like invigilating tests) are challenging.