Secure Wavelet Meshes for Digital Broadcast Encryption
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Solution Overview
Problem
Current encryption methods for digital motion picture media are inefficient in terms of time and cost, as they often require comprehensive encryption of entire frames, which is memory and time intensive, and can be easily cracked with single password techniques, leading to significant losses due to piracy.
Innovation Solution
The method involves subdividing digital motion pictures into three sources of data (light sources, camera angles, and objects) and encrypting specific sub-components of these sources, using 3-dimensional wavelet meshes to create securely managed intermediate wavelets, which are then transmitted only to authorized devices with the proper decryption key, allowing for partial or complete image encryption and decryption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If comprehensive encryption of entire frames is performed, then security against piracy is improved, but computational resources and time required for encryption increase significantly
Solution Approach 1:
The patent divides an image frame into multiple triangular meshes, which are further segmented into barycentric coordinate sub-components (u, v, w coefficients). This segmentation allows selective encryption of only the essential coefficients that control image features, rather than encrypting all pixel data. The segmented approach reduces the volume of data requiring encryption while maintaining security, directly resolving the contradiction between security and encryption efficiency.
Solution Approach 2:
The patent applies encryption selectively to specific local regions of the image represented by key barycentric coefficients, rather than uniformly encrypting the entire frame. By identifying and encrypting only the critical coefficients that define image structure and features, the system achieves adequate security with significantly reduced computational overhead, thus resolving the efficiency-security tradeoff.
2Reliability
If comprehensive encryption of entire frames is performed, then security against piracy is improved, but memory usage increases significantly
Solution Approach 1:
The patent segments the image data into triangular meshes and further into barycentric coordinate components, encrypting only the essential coefficient sets rather than storing encrypted versions of entire frames. This segmentation reduces the quantity of data that must be held in memory for encryption operations, directly addressing the memory usage problem while maintaining security.
Solution Approach 2:
The patent extracts only the critical barycentric coefficients that define image features for encryption, leaving non-essential data unencrypted or in compressed form. This extraction approach reduces memory requirements by focusing encryption resources on the minimal necessary data subset, resolving the contradiction between security and memory consumption.
3Productivity
If selective encryption of image components is performed, then encryption efficiency is improved, but security against piracy may be compromised
Solution Approach 1:
The patent segments image data into triangular meshes with barycentric coordinates, identifying and encrypting only the key coefficients that control essential image features. This selective segmentation maintains security by protecting the most critical data elements while improving efficiency by excluding redundant information from encryption, thus resolving the security-efficiency tradeoff.
Solution Approach 2:
The patent applies different encryption treatments to different local components of the image based on their importance. Critical barycentric coefficients that define image structure are encrypted, while less important data elements are handled differently. This localized quality approach ensures security is maintained for essential features while improving overall encryption efficiency.
Data Source
AI summary
Methods and apparatuses are presented for securely providing digital streaming data to subscriber devices using encrypted wavelet meshes. A recorded image may be subdivided into three sources of data: light sources, camera angles, and the objects themselves. Each of these sources of data may be considered unique from each other, and the totality of the three sources of data may comprise a complete image. Without one of the sources of data, the image may not be complete. Each of the three sources of data may therefore be characterized as key spaces, wherein encrypting part of or the entirety of even one of these key spaces prevents the complete image from being viewed. Methods and apparatuses are provided for utilizing the concept of encrypting at least a portion of at least one of the three key spaces in order to securely and/or privately transmit image data to subscribers.