Encrypted Metadata Broadcast for Confidential Content Delivery
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Solution Overview
Problem
Existing content download services using television broadcast waves struggle to maintain confidentiality of specific-user-oriented content from users other than the intended recipient.
Innovation Solution
A content broadcast system that supplies encrypted metadata and content using a broadcast wave, with service information including broadcast schedules and location information, and provides a decode key for decryption, ensuring only authorized users can access and reproduce the content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If specific-user-oriented content is broadcasted using a television broadcast wave, then the content can be delivered to the intended user, but the content becomes accessible to unauthorized users as well
Solution Approach 1:
The service information is segmented into multiple components: metadata about the content, location information indicating where the content is located in the broadcast wave, and a decode key for decryption. Only the intended reception device can assemble these segments to access the content, while other devices receive only incomplete or encrypted information.
Solution Approach 2:
The patent applies encryption to the metadata and content, changing the state of the information from readable to encrypted. The decode key acts as a parameter that transforms the encrypted content back to its readable form, but only for authorized reception devices that possess the correct key.
2Reliability
If metadata is encrypted to protect confidentiality, then unauthorized users cannot access the content, but the system complexity increases
Solution Approach 1:
The patent introduces service information as an intermediary element that bridges the broadcast wave and the reception device. This intermediary contains the encoded metadata, location information, and decode key, allowing the system to maintain confidentiality without requiring complex point-to-point encryption for each user device.
Data Source
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AI summary
A content broadcast device for broadcasting a content, using a broadcast wave, the content broadcast device including a first supply section configured to supply service information to a content reception device through a predetermined network in response to a request from the content reception device, the service information including at least a broadcast schedule of metadata and location information that indicates where the metadata is located in the broadcast wave, and a broadcast section configured to broadcast, using the broadcast wave, the metadata, which includes at least a broadcast schedule of the content and location information that indicates where the content is located in the broadcast wave, in accordance with the broadcast schedule of the metadata, included in the service information, and broadcast, using the broadcast wave, the content in accordance with the broadcast schedule of the content, included in the metadata.