Physical Layer Security Using Chaotic Communication

Abstract

Wireless communication is vulnerable to active and passive eaves dropping due to its broadcast nature. Conventional security mea sures such as cryptography-based approaches are employed to se cure dataattheuppernetworklayers. However,suchsecuritytech niques maynotbeviableforfuturenetworkssupportinginternetof things (IoT) and large number of sensors due to the high cost, high implementation complexity and limited computational power. In this thesis, for physical layer security, we used chaotic maps to se cure wireless communication. For the security of physical layer, two different techniques are proposed to secure data. In first tech nique, a non-OFDM waveform transmission is proposed with rake receiver to decode data over multipath Rayleigh fading channel. In second method, OFDM waveform is transmitted over a multipath Rayleigh channel. In proposed work, differential encoded informa tion is spreaded with chaotic sequence and than transmitted over wireless channel. We used two different modulation techniques which are differential binary phase shift keying (DBPSK) and dif ferential Quadrature phase shift keying (DQPSK). We observe that both transceiver designed achieve promising performance.