Optical Disc Authentication Protocol Version Handling
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Solution Overview
Problem
Current copyright protection methods for high-definition and 4K content on optical disks, such as Blu-ray disks, face challenges in ensuring secure authentication and copy protection, particularly when using outdated protocols that compromise security levels, allowing unauthorized access and data transfer.
Innovation Solution
A content reading method that identifies version information of the copyright protection method and authentication protocol on both the non-transitory recording medium and host apparatus, determining whether to perform authentication based on compatibility, and sending medium-specific information and encrypted content only to authenticated hosts, thereby ensuring proper authentication and preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If drive-host authentication is performed using outdated protocols, then compatibility with older systems is improved, but security level deteriorates allowing unauthorized access
Solution Approach 1:
The patent changes the parameter of authentication protocol version by introducing version information that indicates the version of the copyright protection method and the version of the authentication protocol. The drive compares these version parameters to determine whether to perform authentication, thereby adapting to different security requirements while maintaining compatibility with older systems.
Solution Approach 2:
The authentication system becomes dynamic by allowing the drive to adjust its behavior based on version information. The drive can selectively perform authentication according to the content's protection level and the host's protocol version, creating a flexible system that adapts between high security modes and compatible operation modes.
2Reliability
If authentication is performed for all content, then copyright protection is improved, but system complexity increases
Solution Approach 1:
The patent applies local quality by making authentication optional rather than universal. The drive determines whether to perform authentication based on the specific content's protection level indicated by version information. This allows authentication to be applied locally to high-security content while skipping it for content that does not require it, reducing overall system complexity.
Solution Approach 2:
The system performs preliminary action by having the drive identify and compare version information before initiating authentication. This preliminary comparison of version parameters allows the system to pre-determine whether authentication is necessary, avoiding unnecessary authentication steps and reducing complexity for content that doesn't require protection.
Data Source
AI summary
A method is provided that includes receiving a command for reading out content from a non-transitory recording medium, and identifying first version information indicating a version of a content copyright protection method. The method includes identifying second version information indicating a version of a protocol used in authentication of the host apparatus, and determining whether the authentication is to be approved or not. The method also includes authenticating the host apparatus according to a result of the determination, reading out medium-specific information, and sending the medium-specific information to the authenticated host apparatus. The method further includes reading out the encrypted content and sending the encrypted content to the authenticated host apparatus, wherein the first version information is identified based on disk information that is meta data stored at a beginning of the recording medium formed in a disk shape in the identifying first version information.