US 8,412,913 B2 · Information processing system, information processing method, and program

Abstract

An information processing system includes: a data processing unit that executes verification processing for a content recorded in a disk and reproduces the disk-recorded content under a condition that the verification succeeds, wherein the data processing unit randomly selects hash units, which are objects of collation, from among a plurality of hash units formed with component data items of the content, reads the selected hash units sequentially from the disk, calculates hash values, and collates the calculated hash values with collation hash values; and the data processing unit executes reading sequence determination processing so as to determine a reading sequence in which the selected hash units are sorted according to recording positions in a disk, and reads the selected hash units according to the determined reading sequence.

Claims17

Dependent claims

An information processing system comprising:

a data processing unit configured:
to execute verification processing for a content recorded in a disk, the content comprising a plurality of hash units,
to reproduce the content under a condition that the verification succeeds,
to select hash units, from among the plurality of hash units,
to read the selected hash units from the disk according to a reading sequence,
to calculate hash values,
to collate the calculated hash values with collation hash values, and
to determine the reading sequence of the selected hash units according to recording positions in a disk, the determined reading sequence corresponding to a minimum number of inter-layer movements when the selected hash units are arranged in a plurality of layers of the disk.

5 more elements

Dependencies are inferred from the claim text.

Information processing system, information processing method, and program

Life of this patent

Information processing system, information processing method, and program

Life of this patent

Abstract

Claims17