I have a place where I want to set up a network connection through a normal residential wall where I can't cut any holes. I don't want to just set up a wireless system. Does anyone make a device that you place on either side of a wall to hook up a connection? Preferably something that can do 100Mb full duplex and can't be eavesdropped on with common hardware?

The situation is that I'm moving into a new place (that I'm renting, so I can't do any cutting) and the POP is in one room and I have all the equipment is in another room.