@inproceedings{scholars150,
            note = {cited By 28; Conference of 2007 International Conference on Intelligent and Advanced Systems, ICIAS 2007 ; Conference Date: 25 November 2007 Through 28 November 2007; Conference Code:74506},
             doi = {10.1109/ICIAS.2007.4658435},
            year = {2007},
           title = {On secure OFDM system: Chaos based constellation scrambling},
         address = {Kuala Lumpur},
         journal = {2007 International Conference on Intelligent and Advanced Systems, ICIAS 2007},
           pages = {484--488},
          author = {Khan, M. A. and Asim, M. and Jeoti, V. and Manzoor, R. S.},
            isbn = {1424413559; 9781424413553},
             url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-57949113863&doi=10.1109\%2fICIAS.2007.4658435&partnerID=40&md5=eb078e1b27ebf4dd3cf65ec375a99364},
        keywords = {Access control; Computer crime; Cryptography; Dynamical systems; Frequency allocation; Frequency division multiplexing; Local area networks; Medium access control; Orthogonal frequency division multiplexing; Standards; Telecommunication systems; Telecommunication traffic; Theorem proving; Wireless local area networks (WLAN); Wireless telecommunication systems, Chaos; IEEE 802.11i; OFDM; Security; Wireless LANs (WLANs), Chaotic systems},
        abstract = {Of late, chaos based cryptography has attracted significant attraction of the researchers due to their simplicity of implementation, complex behavior and extreme sensitivity to initial conditions. In this paper an efficient technique to introduce security at physical (PHY) layer is proposed in 802.11i design to provide security in Medium Access Control. Since it does not emphasize on availability, several denial of service (DoS) attacks are possible. The DoS attacks are easy to mount because management and control frames are unprotected and so are MAC headers. This paper proposes a security scheme at PHY layer by scrambling OFDM constellation symbols to encrypt data transmission to resist against these malicious attacks. The scrambling matrix is based on a key derived from a one dimensional chaotic nonlinear dynamical system using logistc map. The initial condition of the map acting as the derived key is dependent on the external key. The scrambling is completely reversible with the use of appropriate key. However, use of a wrong initial condition even at 4 th decimal point produces entirely different sequence resulting in erroneous constellations with equal probability. {\^A}{\copyright}2007 IEEE.}
}