| 摘要 |
PURPOSE: To improve the safety of the decoding key of a data processing system provided with a processing means processing data in accordance with multiple different data processing routines and a memory means accumulating using data and to make access by an intruder who is not approved, difficult. CONSTITUTION: The processing means of the data processing system is provided with a means for emitting a substantial signal which is previously decided to one data processing routine 16 by processing a first signal 22 with a second signal 24 in accordance with one data processing routine 16 in response to an instruction 20, and a means for supplying at least a part of the second signal 24 for executing a processing by the first signal 22 by retrieving a part 25 of accumulated data from a part of the memory means 14, which is identified by a dynamic pointer 26 included in the instruction for generating the previously decided signal. |
