You get/let someone to trust the physical situation of their machine. In this case of the "maid" getting to play the maid is the engineering part. Once you ha

You get/let someone to trust the physical situation of their machine. In this case of the "maid" getting to play the maid is the engineering part. Once you have physical access to a machine, cracking is usually guaranteed (this is not new or of much interest). This is no different than a complicated "Sneakers" movie style social engineering attack to get physical access to something... it's just easier in a hotel.