DRM Encryption for Social TV Bookmarked Clips
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Solution Overview
Problem
Social TV services face challenges in protecting the digital rights of content providers as bookmarked video clips can be freely disseminated without authorization, potentially decreasing demand for authorized copies and compromising content ownership control.
Innovation Solution
Implementing a digital rights management (DRM) scheme that encrypts bookmarked video clips, allowing only authorized users or devices to decrypt and access the content, using a key management system to authenticate and provide decryption keys based on user entitlements and content access rules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If bookmarked video clips are made freely accessible to users, then ease of operation and user accessibility are improved, but digital rights protection and content ownership control deteriorate
Solution Approach 1:
A DRM system acts as an intermediary between the bookmarked clip and the user. The clip is encrypted and stored on a remote server, while a DRM module in the set top box manages decryption keys and access control. This intermediary layer enables users to access clips without compromising content owner rights, as the system mediates between accessibility and protection requirements.
Solution Approach 2:
The patent changes the accessibility parameter of video clips from unencrypted to encrypted state. By transforming the clip from a readily accessible format to an encrypted format that requires authentication, the system maintains ease of operation for authorized users while ensuring digital rights protection. The decryption key is obtained dynamically based on user entitlements.
2Reliability
If digital rights management encryption is applied to bookmarked clips, then content ownership control and revenue protection are improved, but device complexity and system requirements worsen
Solution Approach 1:
The complex encryption and decryption functions are extracted from the user's set top box and placed on a remote server. Only the necessary decryption keys are downloaded to the set top box when needed, rather than requiring the entire DRM system to be embedded in every user device. This extraction reduces device complexity while maintaining content protection.
Solution Approach 2:
The DRM system provides self-service functionality where the set top box automatically manages its own decryption needs. When a user accesses a bookmarked clip, the system automatically obtains the appropriate decryption key from the server without requiring manual intervention. This self-service approach simplifies user interaction while maintaining robust content protection.
3Reliability
If encryption keys are stored on remote servers, then digital rights protection is improved, but network dependency and communication requirements worsen
Solution Approach 1:
The system performs preliminary action by pre-encrypting bookmarked clips on remote servers before they are accessed by users. The encryption keys are prepared and managed in advance on the server side. When a user requests access, the system can quickly provide the necessary decryption key without requiring complex real-time encryption operations, thus reducing network communication overhead while maintaining strong protection.
Data Source
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AI summary
A method is provided for viewing a bookmarked video clip. The method includes establishing communication over a broadband network with a first network element on which at least one bookmark resides. The bookmark includes metadata identifying a bookmarked video clip of a video program and specifies a network address at which the bookmarked video clip is located. Upon user request, metadata associated with a specified bookmark is received. Communication is established with a second network element on which the specified bookmarked video clip is located using the network address of the specified bookmarked video clip provided in the metadata. The bookmarked video clip is received from the second network element. The bookmarked video clip is encrypted in accordance with a digital rights management scheme. The bookmarked video clip is decrypted and rendered.