| 摘要 |
PROBLEM TO BE SOLVED: To provide an unauthorized act prevention method for an electronic device, allowing securing of high-level security even after disposal of a product, for example. SOLUTION: The unauthorized act prevention method for a card reader 1 having a nonvolatile memory (ROM 12) storing at least an operation program and a memory (RAM 11) storing an erase program erasing the operation program includes: a first step for erasing the operation program by the erasure program when receiving a memory erase command from an upper device; and a second step for erasing the erase program. COPYRIGHT: (C)2010,JPO&INPIT |
