Chip secures wireless transmissions (IMAGE) Princeton University, Engineering School Caption Princeton researchers have developed a method to foil eavesdroppers by building security into the physical nature of wireless transmissions. The signal is clear for the intended recipient but noise for others. Credit Illustration by Ella Maru Studio/Princeton University Usage Restrictions non-commercial use License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.