Methods, systems, computer program products, and methods of doing business whereby document components are secured or controlled using \u201csecurity containers\u201d which encapsulate the components. The interface circuit includes a plurality of signal transporting units, and each of the signal transporting units has a first signal receiving terminal and a second signal receiving terminal for receiving a first input signal and a second input signal respectively. A shearing structure is also presented that minimizes translation of the leaf elements with respect to the receiving surface.