Remote Storage Deduplication via Encrypted Metadata
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Solution Overview
Problem
Existing encryption techniques for copyrighted content transmitted via DTH, DTT, and cable technologies face challenges in flexibility and security, leading to redundancies and vulnerabilities when storing and transmitting content, especially when combined with OTT systems, as remote storage cannot efficiently identify overlapping content without decryption and is prone to security risks.
Innovation Solution
The proposed systems and methods employ double encryption with a common key accessible only to client devices, allowing for commutative encryption that enables remote storage to detect overlaps without decryption, while maintaining security by withholding the common key from remote storage, thus reducing redundancy and enhancing network utilization and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If copyrighted content is encrypted and stored remotely, then security is improved, but remote storage cannot identify overlapping content leading to redundancies
Solution Approach 1:
The patent introduces metadata as an intermediary element that enables remote storage systems to identify and detect overlapping encrypted content without needing to decrypt it. The metadata contains identifiers and hash values that allow the storage system to recognize duplicate content, thereby eliminating storage redundancies while maintaining encryption for security.
2Reliability
If encryption keys are stored on user devices to prevent unauthorized access, then security is improved, but this creates redundancies when content is stored remotely
Solution Approach 1:
The patent extracts the key management function from individual user devices and centralizes it on the server side. The server stores and manages encryption keys, while user devices only maintain access credentials. This eliminates the need for each device to store full encryption keys, reducing redundancy and simplifying key management across the system.
3Productivity
If copyrighted content is transmitted over the network, then content delivery is enabled, but transmitted content may be intercepted and decrypted by bad actors
Solution Approach 1:
The patent applies encryption to content before transmission, performing the security protection action in advance. The content is encrypted on the server side using stored encryption keys before being transmitted over the network, ensuring that even if interception occurs, the content remains protected. This preliminary encryption action eliminates the vulnerability of transmitting plaintext content.
4Ease of operation
If remote storage stores each user's copy of copyrighted content in full, then user access is ensured, but storage efficiency is reduced due to inability to detect overlapping content
Solution Approach 1:
The patent uses metadata as an intermediary mechanism that enables the remote storage system to identify overlapping encrypted content from different users. By comparing metadata identifiers and hash values, the system can detect duplicates and store only unique content, significantly improving storage efficiency while maintaining the ability to provide each user with access to their authorized content.
Data Source
AI summary
A method for identifying a data segment includes receiving a first data segment associated with a first recording time; receiving a second data segment associated with a second recording time, comparing: the first recording time with the second recording time, a first time reference value with a second time reference value, and a first length enumeration for first data packets with a second length enumeration for second data packets; determining, based on the comparing, a match between the first data segment and the second data segment; and identifying the first data segment as the same as the second data segment based on the determining.