Pixel Rearrangement Encryption for Secure LED Media Playback
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Solution Overview
Problem
Conventional media data playback systems lack effective encryption methods to prevent unauthorized projection of media data on LED display screens, especially after the underlying operating system is compromised.
Innovation Solution
A method involving constructing a data arrangement table based on display screen structure parameters, performing data rearrangement to obtain position rearrangement index data, and applying pixel rearrangement encryption to enhance media data security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional encryption algorithms are used for media data, then media data can be encrypted and played back, but the system remains vulnerable to hacking and unauthorized projection
Solution Approach 1:
The patent segments the encryption process into multiple independent components: pixel-level encryption, position rearrangement, and key management. Each component handles a specific aspect of security, making the overall system more robust against hacking while maintaining manageable complexity through modular design
Solution Approach 2:
The patent introduces position rearrangement index data as an intermediary between the encrypted media data and the display hardware. This intermediary layer adds an additional security dimension by mapping logical pixel positions to physical display positions, preventing unauthorized projection even if the encryption is compromised
2Reliability
If pixel rearrangement encryption is applied to enhance security, then media data privacy is significantly enhanced, but the complexity of the encryption process increases
Solution Approach 1:
The patent performs position rearrangement and encryption operations in advance during the media data processing stage. By preparing the encrypted and rearranged data before playback, the system reduces computational complexity during actual display operations while maintaining strong privacy protection through preliminary security measures
Solution Approach 2:
The patent changes the parameter space by introducing position rearrangement index data that maps logical to physical pixel positions. This parameter transformation adds encryption complexity without requiring additional computational resources during playback, as the rearrangement can be performed efficiently using lookup tables
3Reliability
If position rearrangement index data is used to map logical to physical positions, then unauthorized projection is prevented, but the complexity of data processing increases
Solution Approach 1:
The patent creates a copy of the position mapping relationship in the form of lookup tables that can be efficiently queried during playback. Instead of performing complex real-time calculations, the system uses pre-computed position mapping data structures that simplify the data processing while maintaining secure playback control
Data Source
AI summary
A method of encrypting media data includes: obtaining the media data and one or more structure parameters of a display screen of a data playback device; constructing a data arrangement table based on the structure parameters; performing a data rearrangement operation on the data arrangement table to obtain position rearrangement index data, where the position rearrangement index data represents a mapping relationship between a logical position of each of pixels of the display screen and a physical position of the each of pixels; and performing pixel rearrangement encryption on each of one or more image frames of the media data based on the position rearrangement index data, to obtain encrypted media data.