I remember when visiting a friend at mit 2 years ago, I at one point encountered a gal who had an RFID injected into her hand for easy entry to her room, and i was also shown a room where the door frame was decorated with bronze/brass leaves such that if you pressed them in the right order, you'd gain entry (sadly, i think it was only active several residents previously). Crazy / Beautiful ways to open doors are nothing new at mit