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Information processing apparatus, information recording medium, information processing method, and information processing program

A technology for an information processing device and a program, which is applied in recording signal processing, data recording, information storage, etc., and can solve the problems of expensive reproduction devices, improper reproduction of content, and loss.

Inactive Publication Date: 2009-11-18
SONY GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is expensive to manufacture this particular regenerative device
In addition, if such a special playback device is distributed illegally, many users will use this illegal playback device, so there is a possibility that the access control by the content code file loses value.
In this case, there is a possibility that many contents are reproduced improperly and a great loss will be caused

Method used

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  • Information processing apparatus, information recording medium, information processing method, and information processing program
  • Information processing apparatus, information recording medium, information processing method, and information processing program
  • Information processing apparatus, information recording medium, information processing method, and information processing program

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Embodiment Construction

[0049] Hereinafter, an information processing device, an information recording medium, an information processing method, and an information processing program according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0050] First, data stored in an information recording medium will be described. figure 1 is a diagram showing an example of data stored in an optical disc (Blu-ray Disc (registered trademark)) as an information recording medium. figure 1 The optical disc 100 shown in is an example of a content storage optical disc conforming to the AACS (Advanced Access Content System) standard.

[0051] The optical disc 100 stores a content 110 and a content code file 120 as recorded data. It should be noted that, in addition to the above, an optical disc conforming to the AACS standard includes various data such as a key information file applied to the decoded content 100; however, the description of data not di...

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PUM

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Abstract

The present invention discloses an information processing apparatus, an information recording medium, an information processing method and an information processing program. The information processing apparatus includes: a reproducing unit that reads, from a disc, a content and a content code file storing a content code that includes at least any one of a program or conversion data applied to a content reproducing process, to execute the content reproducing process; and a signature verification unit that verifies a digital signature set for the content code file. The signature verification unit verifies the signature using different pieces of set signature target data between a signature verification process executed in reproducing the content recorded in a ROM disc and a signature verification process executed in reproducing the content recorded in a non-ROM disc other than the ROM disc. The reproducing unit, when signature verification is successfully executed by the signature verification unit, applies the content code stored in the content code file, for which signature verification is successful, to reproduce the content. By means of the invention, it is capable of reducing the cost due to non repeat distribution of the established signature.

Description

[0001] Cross References to Related Applications [0002] The present invention contains subject matter disclosed in Japanese Priority Patent Application JP 2008-129140 filed in the Japan Patent Office on May 16, 2008, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to an information processing device, an information recording medium, an information processing method, and an information processing program. More specifically, the present invention relates to an information processing apparatus, an information recording medium, an information processing method, and an information processing program for performing processing using a content code file including an access control program for content, etc., which are stored together with the content It is recorded together on an information recording medium and used for reproducing content. Background technique [0004] Optical discs such as DVD (Digital Versa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/00G06F21/10G06F21/64
CPCG11B20/00173G11B20/00086G11B20/00123G11B20/00166
Inventor 山本和夫上田健二朗
Owner SONY GRP CORP
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