THE flashing lights on computers, modems, network switches and even keyboards could be broadcasting your personal data around your office or home—or even out of the window.
After testing a number of computer systems and pieces of peripheral equipment such as modems for “optical leakage”, two American engineers have found that blinking LEDs can flash out sensitive data in the computer equivalent of Morse code.
In a project undertaken in their spare time, Joe Loughry of Lockheed Martin Space Systems in Denver, Colorado, and David Umphress of Auburn University in Alabama have tested various computer systems over the past…
