| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem that when performing a secured load sequence from a nonvolatile memory in which any defective access is easily generated, it is necessary to manage read data, and the number of times of memory access is increased, and a loading time becomes long, and power consumption is also increased. <P>SOLUTION: Disclosed is a method including a step of reading encrypted data stored in the data area of a nonvolatile memory (NAND type flash ROM) 15 and additional information stored in the redundant part of the nonvolatile memory 15 from the nonvolatile memory 15; a step of performing the decryption of the encrypted data and the hash calculation of the decrypted data by using the encryption processing function of an encryption processing unit 16; a step of reading the decrypted data in a secure memory 12 associated with the processor 11; and a step of confirming that the data are genuine based on the additional information. Disclosed is a device using this method. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
