Physical Cryptography

Senlin Liu, Dongshu Cai, Dongsheng Han +2 more

Rajni Goel, Moses Garuba, Anteneh Girma

Quantum cryptography is an approach to securing communications by applying the phenomena of quantum physics. Unlike traditional classical cryptography, which uses mathematical techniques to restrict eavesdroppers, quantum cryptography is focused on the physics of information. Quantum cryptography provides secure communication, whose security depends only on the validity of quantum theory, i.e., it is guarantied directly by the laws of physics. This is a substantial difference from any classical cryptographic techniques. This article summarizes the current state of quantum cryptography and provides potential extensions of its feasibility as a mechanism for securing existing communication systems

Lorenzo Mucchi, Francesca Nizzi, Tommaso Pecorella +2 more

Physical-layer security (PLS) has raised the attention of the research community in recent years, particularly for Internet of things (IoT) applications. Despite the use of classical cryptography, PLS provides security at physical layer, regardless of the computational power owned by the attacker. The investigations on PLS are numerous in the literature, but one main issue seems to be kept apart: how to measure the benefit that PLS can bring to cryptography? This paper tries to answer this question with an initial performance analysis of PLS in conjunction with typical cryptography of wireless communication protocols. Our results indicate that PLS can help cryptography to harden the attacker job in real operative scenario: PLS can increase the detection errors at the attacker's receiver, leading to inability to recover the cipher key, even if the plaintext is known.

Toshio HASEGAWA, Tsuyoshi Nishioka, Hirokazu ISHIZUKA

B. Hüttner, Antoine Müller, Hugo Zbinden +1 more