Not entirely sure why you&#x27;re being downvoted. Sun terminals have had smartcard access for, what, 15 years? (Yes, for hospitals). It&#x27;s a good idea. Some sort of complementary directional RFID might be even better.<p>E.g. <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=R497CzmKyVQ&amp;t=38s" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=R497CzmKyVQ&amp;t=38s</a>