Secret Key Generation Schemes for Physical Layer Security

Abstract

Physical layer security (PLS) has evolved to be a pivotal technique in ensuring secure wireless communication. This paper presents a comprehensive analysis of the recent developments in physical layer secret key generation (PLSKG). The principle, procedure, techniques and performance metricesare investigated for PLSKG between a pair of users (PSKG) and for a group of users (GSKG). In this paper, a detailed comparison of the various parameters and techniques employed in different stages of key generation such as, channel probing, quantisation, encoding, information reconciliation (IR) and privacy amplification (PA) are provided. Apart from this, a comparison of bit disagreement rate, bit generation rate and approximate entropy is also presented. The work identifies PSKG and GSKG schemes which are practically realizable and also provides a discussion on the test bed employed for realising various PLSKG schemes. Moreover, a discussion on the research challenges in the area of PLSKG is also provided for future research.

Experimental and numerical Investigation on drag reduction using polymer coatings

“…Mai et al evaluated how different types of riblets on submarine surfaces impact drag force, which had a direct impact on the operating efficiency of the submarine [4]. Several studies have suggested that incorporating compliant material surfaces can result in a significant reduction of drag, estimated to be in the range of 10-12% compared to a rigid surface [5]. After a comprehensive comparison, it can be inferred that DR through coatings holds greater potential for development in various fields, as it does not require any alteration to the structure of the object undergoing DR. [6] developed a new polymer coating which can attach to any substrate.…”