US 2006/0190743 A1 · Data processing system, data processing method, and program providing medium

Abstract

The inventive data processing apparatus initially generates verifying values for verifying integrity of contents data stored in a memory device, then stores the verifying values in correspondence with contents data, and then, using the verifying values, the data processing apparatus proves the act of tampering with the relevant contents data, where the verifying values are generated and stored in a memory device per category of contents data. Each of the categories is preset based on a controlling entity of enabling key blocks (EKB) which encipher and provide a contents key (Kcon) provided as a key for enciphering the kinds of categories or contents data. Because of this arrangement, it is possible to effectively and independently executes the process for probing the act of tampering with contents data per controlling entity of the enabling key blocks (EKB) for example.

Claims6

Dependent claims

An information processing apparatus comprising:

detecting means for detecting a recording medium having a data file area storing a plurality of data files and a verification data area storing a plurality of verification data;
reading means for reading a plurality of verification data respectively for a plurality of data files as named in a verification data list and a previously generated total verification data from the verification data area, in response to detection of the recording medium by the detecting means;
generating means for generating a total verification data based on the plurality of the verification data of the verification data list read from the verification data area of the recording medium;
comparing means for comparing the total verification data generated by the generating means with the previously generated and stored total verification data read by the reading means from the verification data area;
and
updating means for updating the previously generated total verification data in the verification data area of the recording medium if an act of tampering with the data file has occurred.

3 more elements

Dependencies are inferred from the claim text.

Data processing system, data processing method, and program providing medium

Life of this patent

Data processing system, data processing method, and program providing medium

Life of this patent

Abstract

Claims6