Abstract: A reproduction device includes: a memory; a drawing processing unit that draws pieces of element data onto a screen according to instruction data which is received from a server, includes the pieces of element data, and instructs to draw the pieces of element data; and a cache control unit that generates, when the instruction data instructs application of a decoration method to the pieces of element data to be drawn, a piece of image data including the pieces of element data keeping positional relationships among them as drawn, and writes the generated piece of image data into the memory. When the instruction data instructs application of the decoration method to the pieces of element data to be drawn, the drawing processing unit applies the decoration method to the piece of image data stored in the memory, and draws the decorated image data onto the screen.

Abstract: A program execution device is a device for executing an application program having at least one class including an execution code created by an object directivity language. The program execution device includes a first execution device having a memory and a processor and a tamper-resistant second execution device having a memory and a processor. When a class is executed, a loader loads an execution code of the class in the memory of the second execution device and loads a portion of the class other than the execution code loaded in the memory of the second execution device, in the memory of the first execution device.