| 摘要 |
According to one embodiment of the present invention, a data encryption process performed in a data encryption means comprises: separating part of the information to be encrypted and determining sequential information; setting the other information, except the sequential information, out of the information to be encrypted as content information; performing a first encryption operation to make the encryption information of the sequential information into indexing information; performing a second encryption operation on the sequential information, independent of the indexing; generating encrypted content information by performing a third encryption operation on the content information, independent of the indexing, in a different manner from the second encryption operation; generating encrypted sequential information by replacing a part of the second encryption result values with the first encryption result values; and storing in a storage means the encrypted content information in correspondence to the encrypted sequential information. |
