Out-of-Process Pointer Styles for Privacy-Preserving UI Feedback
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Solution Overview
Problem
Existing computer user input systems struggle to balance user privacy and efficiency, particularly in extended reality systems, as applications often have unrestricted access to user input data, including preliminary interactions, which can compromise privacy.
Innovation Solution
Implementing a system where user input and rendering are managed by a trusted operating system process separate from the application, allowing for out-of-process pointer styles and resizing effects, ensuring that preliminary interactions are rendered without revealing sensitive data to the application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If applications have unrestricted access to user input data including preliminary interactions, then application functionality and responsiveness are improved, but user privacy is compromised
Solution Approach 1:
The system segments the user input processing into two distinct pathways: preliminary interactions are processed by the operating system in isolation, while confirmed interactions are then provided to the application. This segmentation allows the OS to handle preliminary input rendering without exposing sensitive data to the application, thus maintaining privacy while ensuring responsive feedback.
Solution Approach 2:
The operating system acts as an intermediary between the user input device and the application. It receives preliminary user inputs, processes them independently to generate appropriate rendered feedback, and only passes confirmed interactions to the application. This intermediary role enables the system to maintain application responsiveness while protecting user privacy by filtering what data the application receives.
2Object-affected harmful factors
If a trusted operating system process manages user input separately from the application, then user privacy is enhanced, but system complexity increases
Solution Approach 1:
The operating system provides self-service by independently processing preliminary user interactions and generating appropriate rendered feedback without requiring application involvement. The OS autonomously determines which interactions are preliminary versus confirmed, manages the separation of concerns, and only engages the application when necessary for confirmed inputs, thereby reducing the complexity burden on the overall system architecture.
3Object-affected harmful factors
If preliminary interactions are rendered without revealing sensitive data to the application, then user privacy is maintained, but application efficiency may be reduced
Solution Approach 1:
The operating system performs preliminary actions by processing and rendering feedback for preliminary interactions before involving the application. This preliminary processing eliminates the need for the application to handle every minor input event, reserving application resources for more significant confirmed interactions, thus maintaining application efficiency while preserving privacy.
Solution Approach 2:
The system applies partial action by having the operating system handle only the necessary portion of user interactions (preliminary ones) independently, while leaving confirmed interactions to the application. This selective division of labor prevents the application from being overwhelmed by every input event while still maintaining privacy for preliminary interactions, optimizing overall system efficiency.
Data Source
AI summary
Out-of-process hit-testing can provide privacy in computer user input systems. In an aspect, an application specifies a pointer style for a pointer element according to a location of the pointer element in relation to bounded regions of a UI window. In another aspect, an application specifies a resize effect for a UI element which when triggered by out-of-process hit testing, causes a UI element to change from a first state to a second state.