Overview

• Signal Desktop version 7.55 now includes a default 'Screen Security' feature that prevents Microsoft Recall from capturing screenshots of Signal chat windows on Windows 11.
• The feature leverages Microsoft's DRM mechanism, originally designed for protecting copyrighted content, to block screenshots of Signal's interface.
• Microsoft Recall, rolled out in April 2025 as an opt-in feature with local encrypted storage, periodically captures desktop screenshots to create a searchable activity history.
• Signal criticized Microsoft for not providing developers with tools to exclude their apps from Recall, calling this a significant oversight that forced the use of a workaround.
• While Screen Security enhances privacy, it may disrupt accessibility tools, and users can disable it in Signal's privacy settings if needed.