| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance the security of data in HDD in a short time by using speed which is almost the same as the normal access speed to HDD and in a time zone in which data access cannot be affected. <P>SOLUTION: An HDD device includes HDD15, its control part (for example, CPU13), a random number generating part (for example, random number generating device 12) which generates a random number which is unique to the HDD device and can be reproduced in the HDD device, a data switching part (for example, scramble control part 17 and a temporary memory 19) for switching the data in the HDD15 by a logical sector unit based on the random number generated in the random number generating device 12 at the time of switch off of the HDD device. <P>COPYRIGHT: (C)2012,JPO&INPIT |
