| 摘要 |
PURPOSE:To make it difficult to steal the contents of a main memory by distributively storing data and changing their storing area at a fixed time interval. CONSTITUTION:The data protection system is constituted of a data control part 2 for dividing storing data in a memory 5, distributively storing the divided data in respectively different storing areas, periodically receiving an address rewriting operation starting signal to execute address rewriting operation and changing the addresses of the stored data, a memory control part 3 for controlling the addresses of the storage area in the memory 5 and informing usable addresses to the data control part 2 and a timer control part 1 for measuring time and periodically sending an address rewriting operation starting signal to the data control part 2. |
