An electronic apparatus includes a controller having an interface part communicating with an external host apparatus and a status register group, and having a plurality of functional units communicating with the host apparatus via the interface part, respectively. To this end, a combined magnetic andor electrical measurement is taken at one location on the substrate on or at a distance from the covering layer using at least two different measuring methods. The two paddles are sealed together using a releasable seal to form a paddle module such that the housings of the paddles form the exterior of the paddle module. Postage or shipping cost is automatically billed to an account. Cryptographically strong security is provided by encrypting at least some of the information carried by the media and enabling decryption based on the control set andor other limitations.