Overview

• Signal's Windows app update enables DRM-based Screen Security by default to prevent Microsoft's Recall feature from capturing encrypted chats.
• Microsoft’s Recall feature, which indexes on-screen activity for AI-powered search, lacks an API for developers to exclude sensitive app content.
• Signal developers criticized the need to repurpose DRM tools, calling for proper developer controls to safeguard privacy without accessibility trade-offs.
• Recall has faced ongoing privacy concerns, with researchers finding it still captures sensitive data like payment card details and relies on basic decryption methods.
• The DRM-based workaround only functions under default settings for all chat participants, potentially limiting its effectiveness.