Physical-layer encryption and authentication scheme based on SKGD and 4D hyper-chaos

Abstract

In this paper, a scheme to realize encryption and digital identity authentication at the same time is proposed for enhancing the physical-layer security of point-to-point optical links (PPOL). Exploiting identity code encrypted by the key as authentication information effectively resists passive eavesdropping attacks in fingerprint authentication. The proposed scheme theoretically realizes secure key generation and distribution (SKGD) by phase noise estimation of the optical channel and the generation of identity codes with good randomness and unpredictability by the four-dimensional (4D) hyper-chaotic system. The local laser, erbium doped fiber amplifier (EDFA), and public channel provide the entropy source of uniqueness and randomness to extract symmetric key sequences for legitimate partners. The simulation conducted in a quadrature phase shift keying (QPSK) PPOL system over 100km standard single mode fiber verify successfully that 0.95Gbit/s error-free SKGD. The unpredictability and high sensitivity to the initial value and control parameters of the 4D hyper-chaotic system provide a huge space of ~10125 for identity codes, which is sufficient to resist exhaustive attack. With the proposed scheme, the security level of key and identity can be increased markedly.

A Lightweight Combined Physical Layer Encryption and Authentication Scheme for Industrial Internet of Things

“…Beamforming is to manipulate the electromagnetic wave propagating toward the receiver and requires the transmitter to be equipped with multiple antennas [12]. Physical layer encryption (PLE) encodes the mapping from message bits to constellation symbols with the assistance of the shared key [13], [14]. These approaches have the cooperativity to achieve considerable security by comprehensively mobilizing resources such as power, spatial diversity, and computing power.…”