| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic device which has a plurality of unlocking codes and can prevent an unlocking code from being predicted from another unlocking code or the like as much as possible. SOLUTION: The electronic device which performs a prescribed operation includes a limiting part for limiting at least a part of the operation, a storage part for storing a first unlocking code and a second unlocking code respectively comprising the symbols with the prescribed number of digits, an input reception part for receiving the input of an input code comprising the symbol of at least one digit, and a limitation cancellation part for comparing the input code with the first unlocking code or the second unlocking code and canceling all or a part of the limitation when they match. The first unlocking code has m digits and each digit is constituted of only the symbol of a prescribed category. The second unlocking code has digits other than m digits or at least one digit is constituted of the symbol not included in the prescribed category. COPYRIGHT: (C)2010,JPO&INPIT |
