Personal Library for Multi-Device Content Synchronization
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Solution Overview
Problem
Cloud computing systems face challenges in managing and synchronizing content across multiple devices due to Digital Rights Management (DRM) restrictions, which prevent content from being easily shared or accessed on different devices, especially when the content is bound to a specific device or has security limitations, making it difficult to use purchased or rented content across various platforms.
Innovation Solution
A personal library system that utilizes Digital Rights Management (DRM) and Mobile Rights Management (MRM) to manage and synchronize content across multiple devices, allowing users to access and use content on various devices while ensuring compliance with licensing rules, by incorporating a data block with valid content indicators and device lists, and using push notifications for synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DRM binds content to a specific device to prevent copy-back attacks or for security reasons, then content security is improved, but content accessibility across multiple devices deteriorates
Solution Approach 1:
The patent segments content management into two parts: DRM licensing information remains bound to the original device for security, while content copies can be distributed to multiple devices with appropriate licensing. The personal library acts as an intermediary that manages these segmented rights, allowing content to be accessed on multiple devices while maintaining security through device-specific licensing tokens.
Solution Approach 2:
The personal library serves as an intermediary between the content source and multiple user devices. It receives content with DRM licensing information, processes it into device-specific formats, and distributes it to authorized devices. This intermediary role enables content to be accessible on multiple devices while maintaining security through controlled licensing rather than direct device binding.
2Adaptability or versatility
If content is synchronized across multiple devices using a centric server model, then content accessibility is improved, but control over rented content deteriorates
Solution Approach 1:
The system performs preliminary licensing and authorization actions at the personal library before content distribution. Devices are pre-authorized with specific licensing information that defines their rights to access content. This preliminary action enables seamless synchronization across devices while maintaining provider control through pre-configured licensing rules that automatically enforce rental periods and usage rights.
Solution Approach 2:
The licensing model is dynamic rather than static. Content rights can be automatically revoked or updated across all devices through the personal library without requiring provider intervention. The system dynamically adjusts content accessibility based on licensing terms, rental periods, and device authorization status, enabling both multi-device access and maintained control.
3Ease of operation
If local copying or streaming of content between devices is implemented, then content portability is improved, but compliance with licensing agreements deteriorates
Solution Approach 1:
The personal library creates universal content representations that can function across multiple device types and platforms. Content is processed into standardized formats with embedded licensing information that works across different devices. This universal approach enables easy content portability while maintaining licensing compliance through embedded rights management rather than device-specific restrictions.
4Reliability
If DRM licensing information is embedded within content, then content security is improved, but device complexity increases
Solution Approach 1:
The patent extracts complex DRM licensing management from individual user devices and centralizes it in the personal library. Devices only need to store and present simple licensing tokens, while the personal library handles the complex verification, validation, and rights management. This extraction reduces device complexity while maintaining security through centralized licensing control.
Data Source
AI summary
A personal library on a network enables content to be distributed in a manner that is able to be regulated to prevent users from violating copyright law yet allows user to use the content on more than one device. The personal library receives content from a store and/or contains content and then provides the content including a content management implementation to user devices.