Account-Key Group Encryption for Low-Transaction Content Recording
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Solution Overview
Problem
Existing content recording systems face increased resource consumption due to the volume of DRM licensing transactions required for managing multiple recorded assets, leading to bandwidth and processing capacity challenges.
Innovation Solution
Implementing a session-oriented license model using a customer-specific encryption key (account key) to encrypt and decrypt content across devices, minimizing the number of license transactions needed for access and playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard DRM licensing model is used with individual encryption keys for each content asset, then content security is maintained, but the number of DRM licensing transactions increases with the volume of recorded assets, consuming increased bandwidth and processing capacity
Solution Approach 1:
The patent merges multiple individual content encryption keys into a single account key that is shared across all content assets for a given account. This consolidation reduces the number of DRM licensing transactions from one per content asset to one per account, significantly decreasing bandwidth and processing capacity consumption while maintaining security through the shared account key model
Solution Approach 2:
The account key serves multiple functions simultaneously: it encrypts all content assets for a given account, enables decryption on any authorized device, and replaces numerous individual licensing transactions. This universal key model allows a single key to perform the security function that previously required multiple separate keys and licensing operations
2Reliability
If multiple individual encryption keys are used for different content assets, then each asset can be securely encrypted, but the number of license transactions increases, leading to increased bandwidth consumption and processing capacity demands
Solution Approach 1:
The patent combines multiple content-specific encryption operations into a single account key-based encryption model. Instead of generating and managing separate encryption keys for each content asset, the system uses one account key to encrypt all content, thereby eliminating redundant licensing transactions and reducing bandwidth and processing capacity consumption
3Reliability
If device-specific encryption keys are used for each device, then device-level security is enhanced, but encrypted data cannot be easily shared between devices, requiring additional licensing transactions for each device access
Solution Approach 1:
The account key serves as a universal credential that works across multiple devices while maintaining security. Each device can be associated with an account key, allowing encrypted content to be decrypted on any authorized device without requiring device-specific keys or additional licensing transactions, thus enabling seamless cross-device data sharing
Data Source
AI summary
Systems and methods for managing group encryption are described. In certain methods, a content asset may be encrypted with an asset key. An account key may be determined. Using the account key, an encrypted content asset package may be generated. The asset key may make up at least a portion of the encrypted content asset package. The encrypted content asset package is decryptable with the account key. The encrypted content asset package and an identifier associated with the account key may be transmitted, for example to a playback device.