Other users can watch your browsing and time your keystrokes through OS file notifications

Other users can watch your browsing and time your keystrokes through OS file notifications Researchers at Graz University of Technology have used the file-notification systems in Windows, Linux, and macOS to spy on activity in other accounts.

On Windows, a standard unprivileged account detected 95.7 percent of another user’s visits to popular websites in Firefox, and every site it flagged was one the victim’s browser had loaded. On Linux, a separate weakness exposed keystroke timing, both at the local keyboard and in SSH sessions.