Overview

• Signal has introduced a Screen Security feature in its Windows app, leveraging a DRM flag to block Microsoft's Recall from taking screenshots of its chats.
• Recall, a Windows 11 feature, indexes user activity through periodic screenshots, raising significant privacy concerns despite updates like encryption and opt-in defaults.
• The lack of a dedicated API from Microsoft forces developers like Signal to adopt unconventional solutions to protect user data from Recall's indexing.
• Signal's Screen Security is enabled by default but can be disabled under privacy settings, though it only works when all chat participants use the Windows Desktop app with default settings.
• Privacy advocates and developers continue to call on Microsoft to provide granular controls for Recall, as current safeguards remain insufficient to address all vulnerabilities.