Signal Desktop now includes support for a new “Screen security” setting that is designed to help prevent your own computer from capturing screenshots of your Signal chats on Windows. This setting is automatically enabled by default in Signal Desktop on Windows 11. If you’re wondering why we’re on...
That’s true, but nothing does. Once someone receives a message, you have no control over what they do with it (regardless of communication channel, encryption, etc.). I read the comment above more like “instead of jumping through hoops to get around the spyware in your operating system, use an operating system that does not come with built-in spyware instead”.