| 摘要 |
PROBLEM TO BE SOLVED: To prevent data leakage by preventing decryption of the encrypted data. SOLUTION: The encrypted data obtained by encrypting processing target data comprise a sequence of head data 501 and a plurality of encrypted segment data 502. A decryption processing apparatus decrypts the encrypted data encrypted by the encryption processing apparatus, and in this case, the apparatus uses a solution used for encrypting the encrypted data in the encryption processing apparatus and a file name of the encrypted data. In this apparatus, the data are destructed by deleting or overwriting a region corresponding to the file name of the header data 501 recording the file name of the encrypted data to prevent the decryption of the data. COPYRIGHT: (C)2008,JPO&INPIT
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