Encryption Device for Enhanced Physical Security of Wireless Wave Transmission

An encryption device based on wave-chaos for enhanced physical security of wireless wave transmission is presented. The proposed encryption device is composed of a compact 2D wave-chaotic (disordered) cavity, where a signal passes through before transmission to be distorted in a random fashion. On the receive end, the signal can only be decrypted when it passes through the same device. If a different cavity is used in the receiver, a completely different wave dynamic in that cavity prevents the signal from being decrypted and cause it to appear as noise. We numerically validate the proposed concept.