Video Fingerprinting Authentication for Content Protection
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Solution Overview
Problem
Current digital rights management systems, such as key authentication and digital watermarks, are vulnerable to attacks and lack robustness in protecting copyrighted digital media from unauthorized distribution and use.
Innovation Solution
Implementing real-time compressed domain video fingerprinting and authentication, which samples and authenticates intra-frames of video content using zero-frequency components, providing a robust and efficient method for content protection with fine-grained access control and resistance to tampering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If key authentication is used to limit use of copyrighted materials, then access control is provided, but the system becomes vulnerable to attacks on the key
Solution Approach 1:
The patent extracts the authentication function from key-based systems and implements it through content fingerprinting. Instead of relying on keys that can be attacked, the system extracts and compares unique fingerprint features from content itself, making the authentication process resistant to key attacks while maintaining access control reliability
Solution Approach 2:
The patent introduces content fingerprinting as an intermediary between the content and authentication process. Rather than directly using keys for authentication, the system uses fingerprint features as a mediator that provides reliable access control without the vulnerability to key attacks
2Reliability
If digital watermarks are used for content protection, then content identification is enabled, but the watermarks are not robust and may be rendered useless
Solution Approach 1:
The patent replaces fragile digital watermarks with robust content fingerprinting. Instead of using watermarks that can be easily removed or rendered useless, the system uses fingerprint features extracted from content that are resilient to tampering and remain effective for content identification and authentication
Solution Approach 2:
The patent changes the fundamental parameter of content protection from watermark embedding to fingerprint feature extraction. This parameter change transforms the system from one using fragile watermarks to one using robust fingerprint-based authentication that maintains content identification capability while significantly improving strength and resistance to attacks
3Reliability
If traditional authentication methods are used, then access control is provided, but computational costs are high and real-time authentication is difficult
Solution Approach 1:
The patent extracts only the essential fingerprint features from content for authentication purposes, rather than processing entire content files. This extraction approach maintains reliable access control while dramatically reducing computational requirements and enabling real-time authentication
Solution Approach 2:
The patent applies partial action by sampling only specific intra-frames and extracting only critical fingerprint features from them, rather than analyzing all content data. This partial processing approach provides sufficient authentication reliability while achieving the computational efficiency needed for real-time operation
Data Source
AI summary
An embodiment of an apparatus to authenticate a sequence of video frames includes a process to choose intra-frames of the sequence and sample DC components thereof to produce a set of test fingerprints. To reduce a dimensionality of the test fingerprints, the DC components of the chosen intra-frames are multiplied by a projection matrix formed of eigenvectors associated with the larger eigenvalues of a covariance matrix for a library of frames. The projected test fingerprints are compared against a reference set of fingerprints for authentication. Time-stamp spacings of the chosen intra-frames are determined, and these spacings are employed to select candidate frames for authentication in the reference set of fingerprints.