Physically Encrypted Wireless Transmission Based on XOR between Two Data in Terahertz Beams

Abstract

Future wireless communications require higher security as well as a higher data rate. We have been studying physically secured wireless transmission systems and previously proposed encryption/decryption techniques based on the AND operation caused by coherent detection between two encrypted data sequences on two different terahertz carriers. Furthermore, we suggested that by employing the XOR operation as the decryption, the proposed system can be made more secure because XOR increases the computational complexity for eavesdroppers to recover the plaintext. In this paper, we propose the XOR operation between two data sequences on FSK-modulated terahertz waves. By constructing the XOR encryption transmitters/receivers, which consisted of high-speed wavelength tunable lasers and arrayed uni-traveling-carrier photodiodes (UTC-PDs), we successfully demonstrated the XOR operation between two data sequences on 200 GHz waves from the two transmitters.

Investigating UAV-Based Applications in Indoor–Outdoor Sports Stadiums and Open-Air Gatherings for Different Interference Conditions beyond 5G Networks

“…Technology Concern Cause [30] Terahertz (THz) waves Physical-layer security in terahertz wireless networks Interferences in frequencies [31] Internet-of-Things (IoT), cyber-physical systems (CPSs) Increasing need for communication has led to an increase in security concerns Latency and Interferences in frequencies [32] Terahertz (THz) waves Use of the highly directional THz waves, eavesdropping attacks on the transmission system can be theoretically prevented.…”

“…The key to meeting these challenges is using artificial intelligence (AI) to create stronger, more efficient terahertz communication protocols. The scope of related work with the advanced technologies is highlighted in Table 2 [ 30 , 31 , 32 , 33 , 34 ].…”