Streaming Data Signature Management via Header Partitioning
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Solution Overview
Problem
The challenge lies in ensuring the integrity and privacy protection of streaming data, such as moving pictures and aural data, while allowing for partial extraction and sanitization, particularly in legal evidence where alteration or editing is a concern, and privacy protection is necessary.
Innovation Solution
A signature management system that includes a signature-related information preparing device and storage device, which partitions streaming data into stream and user header information, storing signature-related information in a form that prevents start codes from emerging, enabling secure extraction and verification of cut-out data while maintaining privacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If streaming data is stored in original form for evidence purposes, then completeness and authenticity are maintained, but privacy protection is compromised due to potential exposure of sensitive information
Solution Approach 1:
The patent segments streaming data into multiple packets and selectively extracts only necessary portions for evidence purposes. This allows maintaining authenticity of required data while excluding sensitive information, thus resolving the contradiction between evidence completeness and privacy protection.
Solution Approach 2:
The patent extracts specific portions of streaming data that are needed for legal evidence while leaving sensitive information behind. This extraction mechanism ensures that only relevant data is preserved for authentication purposes, thereby protecting privacy while maintaining evidential integrity.
2Object-affected harmful factors
If streaming data is extracted and sanitized for privacy protection, then confidentiality is maintained, but integrity verification becomes difficult
Solution Approach 1:
The patent applies preliminary actions by embedding authentication information and digital signatures into the data structure before extraction and sanitization occurs. This ensures that integrity verification can be performed on extracted portions without compromising privacy, as the authentication mechanisms are already in place prior to any data modification.
Solution Approach 2:
The patent introduces intermediary elements such as authentication information and digital signatures that mediate between privacy protection and integrity verification. These intermediaries allow verification of extracted data authenticity without exposing sensitive information, thus resolving the contradiction between confidentiality and verifiability.
3Reliability
If digital signatures are added to streaming data for authentication, then legitimacy is ensured, but data structure complexity increases
Solution Approach 1:
The patent makes the data structure universal by designing it to serve multiple functions: carrying both authentication information and sanitized data in a unified format. This multi-functionality reduces overall complexity compared to maintaining separate structures for authentication and data content, as the same structure handles both purposes.
Data Source
AI summary
A signature management apparatus and method of cutting-out streaming data. The signature management apparatus includes a signature-related information preparing device which prepares signature-related information for streaming data, a signature-related information storage device which partitions a sequence header of the streaming data into stream header information needed for reproduction of the streaming data and user header information which a user can freely use for storage, and stores the signature-related information within the user header information in a form that allows no start code to emerge.