Content data judging apparatus

Details Content data judging apparatus Content data judging apparatus

H - Electricity

04

L

H04L 9/32 (2006.01) G06F 7/04 (2006.01) G06K 9/00 (2006.01) H04N 1/387 (2006.01) H04N 5/91 (2006.01) H04N 7/167 (2006.01)

Patent

CA 2307534

It is one object of the present invention to provide a contents data judging apparatus and method for accurately determining whether an exchange of contents data occurred from the time the data were produced until an alteration of the data was detected, for identifying an occasion on which the contents data may be altered, and for identifying a portion of the data that was altered. A contents data judging apparatus, which determines whether contents data prepared by a digital device were altered, comprises: (1) means for performing an authentication process using a medium on which contents data are recorded; (2) means for reading the contents data from the medium; (3) means for embedding, in the contents data, data for verifying the pertinent contents; (4) means for extracting, from the contents data, the data for verifying the pertinent contents; and (5) means for using the results of the extraction to determine whether the contents data were altered. Preferably, the means (5) includes means for, when the contents data were altered, identifying a portion containing altered data.

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