In a planar transformer, at least a portion of each of the windings are intermingled in an intermingled portion. In the solution, the batch application is first analyzed to identify a set of processing segments or units of work, where each unit of work is of a size that minimizes interference with other data accesses. The common keys are received in encrypted form, encrypted according to a secret key unique to each semiconductor integrated circuit. The server then sends to the client device the frame and meta data of the 3D models and sounds which are pre-stored in the client device via the network.