Video Forensic Data Embedding via Segmented Encryption
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Solution Overview
Problem
The processing required for reproducing video content with embedded forensic information is more complex and burdensome compared to content without such information, particularly due to the need for managing different transmission and recording formats.
Innovation Solution
An information processing apparatus and method that receives and decrypts encrypted data patterns using unique keys, allowing for the generation and reproduction of video content by reading and decrypting encrypted data based on position and size information, facilitating the embedding and reproduction of forensic information within video content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If forensic information is embedded in video content by encrypting multiple patterns with unique keys, then the ability to identify illegal reproduction sources is improved, but the processing complexity and burden on reproduction apparatus increases
Solution Approach 1:
The video content is divided into multiple segments, with only specific segments containing encrypted forensic information while other segments remain unencrypted. This segmentation allows the reproduction apparatus to process only necessary encrypted portions rather than the entire content, reducing overall processing complexity while maintaining forensic identification capability.
Solution Approach 2:
Different parts of the video content have different encryption states - some segments are encrypted with unique keys for forensic information, while other segments are left unencrypted for efficient reproduction. This local differentiation optimizes the balance between forensic reliability and reproduction efficiency by applying encryption only where necessary.
2Reliability
If multiple patterns of video content data are encrypted with unique keys for forensic information, then the security against illegal distribution is improved, but the reproduction processing time and computational burden increase
Solution Approach 1:
Instead of encrypting all video content patterns, the system applies encryption to only specific segments containing forensic information. This partial action approach maintains security for critical identification data while avoiding the time penalty of encrypting and processing the entire video content during reproduction.
Solution Approach 2:
The encrypted segments with forensic information are prepared and positioned in advance within the video content structure. During reproduction, the apparatus can directly access and process only these pre-positioned encrypted segments rather than performing comprehensive encryption operations, reducing real-time processing time.
3Reliability
If all data in video content is encrypted to ensure security, then the protection against illegal copying is improved, but the ease of reproduction and playback deteriorates
Solution Approach 1:
The video content structure is designed with heterogeneous encryption characteristics - critical forensic segments are encrypted with unique keys for security, while other segments remain unencrypted to maintain ease of reproduction. This local quality differentiation allows the system to achieve both security and operational simplicity simultaneously.
Solution Approach 2:
The video content is segmented into encrypted forensic portions and unencrypted reproduction portions. This segmentation enables the reproduction apparatus to handle unencrypted data efficiently for normal playback while still providing security through encrypted segments, thus improving ease of operation without completely sacrificing protection.
Data Source
AI summary
The present disclosure relates to an information processing apparatus and an information processing method which facilitate reproduction of the data obtained by encrypting prepared multiple patterns regarding at least part of data of content with unique keys. An image acquiring unit receives an image file containing: encrypted data that is obtained by encrypting with unique keys multiple pieces of pattern data regarding forensic object data which is at least part of encoded image data of video content and that has an identical size; unencrypted data, of the encoded image data of video content, which is not encrypted with any one of the keys; size information that represents the size of the encrypted data; and position information that represents a position of the encrypted data in the file. The present disclosure can be applied to a video reproducing terminal and the like.