Signal has introduced a "screen security" feature for its Windows 11 application to counter Microsoft's Windows Recall, an AI feature that captures screenshots of user activities. This new feature ensures that any attempts by Recall to take screenshots will result in a black screen. Signal's blog post notes that while the feature enhances privacy, it may cause compatibility issues with some accessibility tools, and users can disable it if necessary. The feature only protects the local machine and does not prevent other conversation participants from taking screenshots. Signal criticized Recall for lacking built-in privacy controls for app developers and emphasized the need for operating system developers to prioritize user privacy. The screen security feature is being rolled out and is enabled by default for Windows 11 users.