| 摘要 |
PROBLEM TO BE SOLVED: To prevent the manufacture of fraudulent components such as a back ROM and a hanging substrate, to determine propriety in an external device and to contribute to the healthy development of a game industry in general by improving the secrecy of a game program and making analysis impossible or extremely difficult. SOLUTION: The arithmetic processing unit for games ciphers and fetches a first key needed for deciphering the game program 202a ciphered by a prescribed algorithm and holds a second key needed for deciphering the first key inside. Even when the ciphered game program falls into the hand of a third person, the ciphered game program can not be deciphered unless the first key and the second key fall into the hand. Since information copied and stored in an information storage means is transferred to the external device on the basis of a memory content request command from the external device capable of determining the propriety of the arithmetic processing unit for the games, the propriety of the arithmetic processing unit for the games is determined in the external device. COPYRIGHT: (C)2008,JPO&INPIT
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