To provide a certification data generation technique for changing limit information such as the generation condition of an authority at a user's side.

Auxiliary information 102 is inputted from an auxiliary information inputting part 203, and control information 101 corresponding to the auxiliary information 102 is inputted to a control information inputting part 202. Moreover, a user inputs new control information to the control information inputting part 202. The inputted control information and auxiliary information is transmitted through a data bus 204 to an auxiliary information generating part 205. The auxiliary information generating part 205 calculates new auxiliary information from the transmitted control information and auxiliary information based on a prescribed expression, and transmits the result through the data bus 204 to an auxiliary information outputting part 206. The auxiliary information outputting part 206 outputs the transmitted new auxiliary information 105.