Reminds me of this other "covert information receiving technique for individuals being closely watched", but in this case used for cheating on a proctored exam:

Reminds me of this other "covert information receiving technique for individuals being closely watched", but in this case used for cheating on a proctored exam: https://news.ycombinator.com/item?id=30675666 https://news.ycombinator.com/item?id=30675666