DEVICE INFORMATION GENERATING UNIT, DEVICE INFORMATION GENERATING METHOD, CONTROL DATA GENERATING UNIT, CONTROL DATA GENERATING METHOD, INFORMATION USING UNIT, METHOD OF USING INFORMATION, AND STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a device information generating unit which is capable of avoiding both a very important security problem and a side effect problem which occurs at revocation to deteriorate a user's usability in a technique of controlling the use of data in a device in use by control data. SOLUTION: A device identifier composed of a set of figures allotted to a device 30 in use is inputted into a path function calculator 106, and the path function calculator 106 calculates a path function value corresponding to the partial path of the device identifier.