| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an information processor in which the fraudulent alteration of digital contents can be surely detected. <P>SOLUTION: On a transmitting side 100 of the digital contents, with respect to the relevant digital contents, prescribed information (electronic signature information) is generated on the basis of a degree of a change applied to the relevant digital contents, and this information is outputted to the outside while being added to the relevant digital contents. For example, an index (electronic signature information) is generated for deciding the change of the digital contents in accordance with whether the degree of the change of the relevant digital contents is settled within a range recognizable for a human being (within a change level to be regarded as the fraudulent alteration) and the index is added to the relevant digital contents. <P>COPYRIGHT: (C)2003,JPO |
