| 摘要 |
A memory card insertion type electronic equipment reads authentication data from a memory card, decodes the read authentication data to a set of information by using a secret key, and compares the data read from an application program, which has been stored in the memory card, according to the address of the set of information with the data of the set of information in order to check the memory card for authenticity. There is also provided a memory card writing apparatus that encodes, by using a secret key, a set of information composed of an address generated at random and the data read from an application program, which is run on the memory card insertion type electronic equipment, according to the address, and writes the encoded set of information as the authentication data in the memory card.
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