An in-plane switching mode liquid crystal display includes a top substrate and a bottom substrate being in parallel with and opposite to the top substrate, a first electrode and a second electrode elongated along a first direction in an interlaced arrangement, and a plurality of liquid crystal molecules filled in between the top substrate and the bottom substrate. The portable authentication system may be either a single integrated system or a dual system where the security module can be removed or disconnected from the interface system. The carrier body is slidably received within the device housing for movement between an advanced position and a retracted position. In an aspect, an apparatus is provided for coding data.