| 摘要 |
PROBLEM TO BE SOLVED: To provide an encrypting and decrypting program hardly causing an information leakage. SOLUTION: The encrypting program for executing the encryption of input data by a computer comprises: a step for generating key data for each constitutional unit constituting the input data; a step for encrypting the constitutional unit data based on the key data and generating encryption data; a step for storing the encryption data in a storage means; and a step for recording the key data in a key database without making the key data correspond to the encrypted data. In this configuration, it is possible to obtain the encryption system hardly decrypting the whole of data. COPYRIGHT: (C)2006,JPO&NCIPI
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