Pseudo-Random Frame Sequencing for Secure Mobile Display Viewing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing alternate frame sequencing (AFS) systems for secure viewing of private information on mobile devices are insufficient in security, as simple sequences can be compromised by unauthorized viewers with shutter glasses, and there is a need for enhanced methods to maintain device functionality and security, especially in varying environments and for multiple viewers with different clearance levels.
Innovation Solution
The system employs pseudo-random synchronization parameters, periodic re-authentication, and environmental parameter sensing to dynamically adjust frame display rates and durations, ensuring only authorized users can view private information using active shutter glasses, while maintaining basic device functionality and accommodating multiple viewers with different clearance levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If simple alternate frame sequencing is used, then device complexity is reduced and ease of operation is improved, but security reliability deteriorates as unauthorized viewers can decode the frames
Solution Approach 1:
The patent applies parameter changes by transitioning from simple alternate frame sequencing to pseudo-random frame sequencing. The frame sequence is no longer a simple alternating pattern but is instead generated using a pseudo-random number generator seeded with a secret key. This changes the temporal parameter of frame display from predictable to unpredictable, making it computationally infeasible for unauthorized viewers to decode the private information without the correct seed key.
2Reliability
If pseudo-random frame sequencing is implemented, then security reliability is improved, but device complexity increases due to synchronization requirements
Solution Approach 1:
The patent introduces an intermediary synchronization mechanism that coordinates between the display device and the viewing device. A synchronization signal is transmitted from the display device to the viewing device, carrying timing information and synchronization keys. This intermediary signal ensures that both devices maintain identical pseudo-random frame sequences without requiring complex direct coordination, thereby managing the added complexity through a dedicated communication protocol.
Solution Approach 2:
The patent implements preliminary action by establishing synchronization parameters and keys before the actual display of private information begins. The viewing device receives and stores synchronization signals in advance, ensuring that when the pseudo-random frame sequence starts, both devices are already aligned. This preliminary setup prevents the need for complex real-time synchronization adjustments during the display of sensitive content.
3Reliability
If frame display rate is increased to improve security, then unauthorized viewing is reduced, but productivity decreases due to longer authentication periods
Solution Approach 1:
The patent applies periodic action by implementing re-authentication at regular intervals during the display of private information. Instead of requiring continuous authentication, the system performs authentication periodically (e.g., every N frames or after time interval T). Between re-authentication events, the pseudo-random frame sequence continues to play out, providing security without the productivity penalty of continuous authentication checks. This periodic approach balances security reliability with viewing productivity.
Data Source
AI summary
Private information can be displayed using alternate frame sequencing to prevent unauthorized viewing. The private information can be ascertained by an authorized user using an active shutter viewing device synchronized to the alternate frame sequencing display. Private information can be displayed on a portion of the display, while public information, including a basic user interface, can be displayed on a second portion visible to authorized and unauthorized users. For enhanced security, alternate frame sequencing synchronization parameters can be encrypted and exchanged between a display device and the viewing device. When and where to display private information using alternate frame sequencing can be determined using environmental sensors. A single display screen can be configured to simultaneously present private information to multiple users, each user permitted to view a portion of the private information according to the unique synchronization parameters employed by a user's viewing device.