Encryption Device Based on Wave-Chaos for Enhanced Physical Security of Wireless Wave Transmission

TL;DR

This paper presents a wave-chaos based encryption device that enhances wireless transmission security by using disordered cavities to distort signals, which can only be decrypted with an identical cavity, preventing unauthorized access.

Contribution

It introduces a novel wave-chaos encryption method using disordered cavities for secure wireless communication, demonstrated experimentally.

Findings

Successful experimental demonstration of wave-chaos encryption

Encryption relies on identical cavity shapes for decryption

Different cavity shapes produce noise, preventing unauthorized decoding

Abstract

We introduce an encryption device based on wave-chaos to enhance the physical security of wireless wave transmission. The proposed encryption device is composed of a compact quasi-2D disordered cavity, where transmit signals pass through to be distorted in time before transmission. On the receiving end, the signals can only be decrypted when they pass through an identical cavity. In the absence of a proper decryption device, the signals cannot be properly decrypted. If a cavity with a different shape is used on the receiving end, vastly different wave dynamics will prevent the signals from being decrypted, causing them to appear as noise. We experimentally demonstrate the proposed concept in an apparatus representing a wireless link.