Information Processing Device Content Reproduction Data Transformation

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Solution Overview

Problem

Current methods for preventing unauthorized copying of digital content, even with encryption, face challenges in securely replacing content data during reproduction without leaking information, especially when the secret key is compromised.

Innovation Solution

An information processing device and method that performs data transformation by replacing part of the content configuration data with transformation data, using a parameter generating unit to provide parameters for the transformation process, ensuring secure data processing and preventing information leakage during reproduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If encryption processing is applied to content, then unauthorized copying is prevented, but if the secret key is leaked, the original content can still be decrypted

Engineering Contradiction:

Improvecopyright protectionVSAvoidvulnerability to key leakage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The content is divided into multiple segments, and different dummy data replacement patterns are applied to different segments. This segmentation ensures that even if one segment's decryption key is compromised, the entire content cannot be fully reconstructed, as each segment has unique transformation characteristics

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Dummy data is introduced as an intermediary element between the original content and the stored content. The dummy data serves as a protective layer that must be removed through specific replacement processing, adding an additional security barrier beyond simple encryption

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If dummy data replacement is performed on content, then unauthorized reproduction is prevented, but information leakage during reproduction processing may occur

Engineering Contradiction:

Improveunauthorized reproduction preventionVSAvoidinformation leakage

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

Different replacement processing methods are applied to different portions of the content based on local characteristics. Configuration data receives different treatment than other content data, with each type undergoing replacement processing tailored to its specific security requirements and structure

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The replacement processing changes various parameters of the dummy data including its position, length, and content characteristics. By dynamically adjusting these parameters during reproduction, the system prevents information leakage while ensuring proper content restoration

Inventive Principle:

Principle #35Parameter changes

3Reliability

If configuration data is replaced with dummy data, then content security is improved, but data transformation processing complexity increases

Engineering Contradiction:

Improvecontent securityVSAvoiddata transformation processing

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Dummy data is pre-generated and stored in the content before reproduction. The replacement processing uses this pre-prepared dummy data rather than generating it dynamically, significantly reducing the computational complexity and processing time required during actual reproduction operations

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8203730B2Information processing device, information recording medium manufacturing device, information recording medium, methods therefore, and computer program

Publication Date: 2012.06.19 SONY GROUP CORP

AI summary

An information processing device for executing content reproduction processing includes: a content reproduction processing unit for executing data transformation processing for replacing a part of configuration data of input content to be reproduced with transformation data, and executing processing for reproducing the reproduction content; and a parameter generating unit for providing the content reproduction processing unit with a parameter to be applied in the data transformation processing; wherein the content reproduction processing unit has a configuration for obtaining a parameter identifier that is different for each segment set as a sectioning region of reproduction content, and outputting a parameter calculation request accompanied by the parameter identifier to the parameter generating unit; and wherein the parameter generating unit has a configuration for providing the content reproducing unit with a parameter corresponding to a segment, in response to the parameter calculation request from the content reproducing unit.