Removable Media Content Access Control via Segmented Authentication
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Solution Overview
Problem
Existing content viewing restriction systems face increased risk of tampering due to storage of restriction information on personal computers connected to communication networks, necessitating a solution that securely limits access to specific viewers while preventing unauthorized access.
Innovation Solution
A content viewing restriction system utilizing removable media with nonvolatile memory to store first viewing restriction information and a detachable media to store second viewing restriction information, ensuring secure playback only when conditions are met, thereby reducing network exposure and enhancing security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If restriction information is stored in the personal computer's storage unit, then the content playback apparatus can check authentication information, but the risk of tampering of restriction information increases due to network connectivity
Solution Approach 1:
The restriction information is divided into two separate sets: first restriction information stored in the detachable storage medium and second restriction information stored in the personal computer's storage unit. This segmentation ensures that no single storage location contains all authentication data, reducing the impact of potential tampering at any one location.
Solution Approach 2:
A detachable storage medium acts as an intermediary carrier for the first restriction information. This intermediary element can be physically removed and stored securely, separating the authentication data from the network-connected personal computer and thereby reducing exposure to network-based tampering risks.
2Ease of operation
If the personal computer is always open to communication network for content playback, then network accessibility is maintained, but security protection is weakened
Solution Approach 1:
The first restriction information is pre-stored in the detachable storage medium before the content playback process begins. This preliminary action allows the authentication data to be prepared in advance in a secure, offline location, so that network connectivity is not required during the actual authentication process.
Solution Approach 2:
The detachable storage medium serves as an intermediary that carries authentication data between secure offline storage and the network-connected personal computer. This intermediary enables the system to maintain network accessibility while protecting security by keeping sensitive data isolated from network exposure during transmission and storage.
Data Source
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AI summary
A system includes a content playback apparatus 10, a removable media reading apparatus 20 that is provided with a nonvolatile memory 22m in which first viewing restriction information is stored, and that is detachably attached to the content playback apparatus 10, and a removable media 30 in which second viewing restriction information is stored, and the removable media 30 being detachably attached to the removable media reading apparatus 20, and the content playback apparatus 10 checks the first viewing restriction information against the second viewing restriction information, and if the first viewing restriction information satisfies a condition of the second viewing restriction information, removes a playback restriction on a content stored in the removable media 30 in a state of being restricted for playback. It is possible to restrict viewers of the content to specific target persons, and also it is possible to reduce the risk of tampering of the viewing restriction information, and increase security in content management.