Sensitive data can leak through visual copies of a screen as well as through files. Determine screen-protection requirements by the data class displayed in each view.
Evaluation approach
Appropriate window flags affect screenshots and presentation on insecure displays. Test operating-system, multi-window and screen-sharing scenarios.
Application example
For a view containing a one-time code or financial document, also inspect the preview created when the application enters the background.
Limits and considerations
External cameras remain outside the application's control. Documents that users need to share may require a separate workflow.
Consider the content lifecycle
Preventing capture of a sensitive screen does not close other disclosure paths. Notification previews, task-switcher images, error logs and sharing flows are separate surfaces. Inspect the information visible in each.
Use representative data rather than real customer information in internal tests. Document the versions and environments where screen protection works. Do not promise absolute confidentiality against recording methods, such as an external camera, that the application cannot control.
Checks and decisions
- Identify sensitive screens
- Test background previews
- Separate sharing requirements
Measure support and usability effects before applying one restriction to every screen.
Sources
The primary references above provide the technical basis. Example workflows and evaluation suggestions are this publication’s explanations, not independent test results for a particular product.