A security socket for use with a panel having at least one assembly hole is provided. The security socket includes a data socket and a security unit. The socket has a slot and is connected to the assembly hole of the panel in a direction toward the inner surface of the panel. The security unit engages with the socket in a direction toward the outer surface of the panel. The security unit has a protrusion and a through hole corresponding to the slot of the socket, and the protrusion perpendicularly extends from the surface of the through hole, wherein the protrusion further has an insertion hole penetrating through a bottom of the protrusion.