External Storage Medium for Digital Content Copyright Protection
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Solution Overview
Problem
Conventional techniques for recording and reproducing digital contents are limited in the number of reproductions, allow duplication, and require inconvenient information management, making it difficult to preserve and transfer broadcasted contents without copyright protection.
Innovation Solution
A system comprising a recording and transmission device, a reception and reproduction device, and a portable external storage medium that uses unique information to control content delivery, encryption, and reproduction, ensuring only authorized devices can access and reproduce contents, while appearing to store data on the external storage medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of contents reproduction is limited to prevent copyright infringement, then copyright protection is improved, but user convenience deteriorates because users cannot reproduce broadcasted contents multiple times on different devices
Solution Approach 1:
The patent introduces an external storage medium as an intermediary that holds key information and unique device identifiers. This mediator enables the system to verify device authorization without hardcoding restrictions into the reproduction logic, allowing flexible copyright protection while maintaining user convenience through automatic verification.
Solution Approach 2:
The patent shifts the copyright protection mechanism from a single-dimension approach (limiting reproduction count within one device) to a multi-dimensional approach by introducing device identification and external storage medium verification. This allows the system to protect copyrights while enabling reproduction across multiple authorized devices.
2Ease of operation
If contents are preserved in a receiver for later reproduction, then accessibility is improved, but security deteriorates because preserved data can be transferred to other devices
Solution Approach 1:
The external storage medium acts as an intermediary that securely holds key information required for decryption. Even when contents are preserved in the receiver, the key information remains in the external storage medium, preventing unauthorized transfer to other devices while allowing legitimate reproduction on authorized devices.
Solution Approach 2:
The system performs preliminary verification by checking whether the reproducing device's unique identifier matches the one stored in the external storage medium before allowing reproduction. This preliminary action prevents unauthorized access while enabling convenient reproduction on authorized devices.
3Reliability
If users manually manage communication information and device addresses for content delivery, then delivery control is improved, but system complexity deteriorates requiring users to obtain and manage multiple pieces of information
Solution Approach 1:
The system automatically manages communication information and device addresses by storing them in the external storage medium during the initial content delivery process. Users simply need to connect their reproducing device to the external storage medium, and the system automatically retrieves the necessary communication information, eliminating the need for users to manually manage complex delivery control data.
Data Source
AI summary
A system for reproducing contents in a different device conveniently in use while protecting a copyright of digital contents includes a contents recording and transmission device, a reception and reproduction device, and an external storage medium having an ID. The external storage medium is connected to the reception and reproduction device. The ID is transmitted to the recording and transmission device, and ascertained. Then contents are delivered. The external storage medium has a list of contents stored therein. In the case where the contents are recorded in a plurality of devices, only a device to which the external storage medium is connected is made to be capable of reproducing the contents. A contents reproducing function is implemented as a program in a component form.