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Secrecy Capacity of Symmetric Keys Generated by Quantising Channel Metrics Over a Fading Channel

  • L. SrividyaEmail author
  • P. N. Sudha
Conference paper
Part of the Lecture Notes in Networks and Systems book series (LNNS, volume 98)

Abstract

Physical layer security has become the cornerstone of the wireless communication system. Key generation by channel estimation enables legitimate users to generate keys in a decentralised manner than sharing secret information in open wireless mediums. In this paper we propose secrecy evaluation of symmetric keys which are, generated by channel metrics estimated over the Rayleigh fading channel, encrypted and transmitted over a fading channel in the presence of an eavesdropper. The results are obtained in terms of secrecy capacity and outage probability for various key sizes, different position of eavesdroppers from the source. It is seen that as key size increases and distance of eavesdropper increases from the source the secrecy capacity increases. Also the performance of keys derrived from various channel metrics such as complex channel path gains, EVM rms and complex phase difference are discussed in this paper.

Keywords

Physical layer security Key generation One time pad encryption Channel metrics Secrecy capacity Quantisation Outage probability 

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Department of ECEDayananda Sagar College of EngineeringBangaloreIndia
  2. 2.Department of ECEK.S. Institute of TechnologyBangaloreIndia

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