Countermeasures and detection Detecting physical steganography requires a careful physical examination, including the use of magnification, developer chemicals, and ultraviolet light. It is a time-consuming process with obvious resource implications, even in countries that employ many people to spy on their fellow nationals. However, it is feasible to screen mail of certain suspected individuals or institutions, such as prisons or prisoner-of-war (POW) camps.
Countermeasures and detection Detecting physical steganography requires a careful physical examination including the use of magnification developer chemicals and ultraviolet light It is a time-consuming process with obvious resource implications even in countries that employ many people to spy on their fellow nationals However it is feasible to screen mail of certain suspected individuals or institutions such as prisons or prisoner-of-war (POW) camps