| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent unauthorized acquisition of an encryption key. <P>SOLUTION: The electronic apparatus is constituted of an encryption key storage device 1 to store the encryption key, a program loader 4, an encryption/ decryption device 5, an encrypted data storage device 6 to store the encrypted data, a data developing storage device 7 to store data to be decrypted, and an execution device 8 to execute a program code developed by the data development storage device 7. The encryption key storage device 1 comprises a plurality of divided key storage devices 2-1, 2-2, and 2-3 to store a plurality of the previously set divided keys and a key-generating/restoring device 3 to generate the encryption key, by compositing a plurality of the divided keys in accordance with a different prescribed generation rule for each electronic apparatus. <P>COPYRIGHT: (C)2004,JPO</p> |
