IMPROVING SECURITY IN CHAOTIC SPREAD SPECTRUM COMMUNICATION SYSTEMS WITH A NOVEL ‘BIT POWER PARAMETER SPECTRUM’ MEASURE

Branislav Jovic, Charles Unsworth

Abstract

Due to the broadband nature and the high sensitivity to parameter and initial conditions in chaotic signals, chaotic spread spectrum (SS) communication systems have been regarded as highly secure. However, it is often easier to decrypt chaotic parameter modulation (CPM) based SS systems than was originally thought. In this paper, a single user CPM based chaotic communication system implementing Pecora-Carroll (PC) synchronization is described. Following this, the CPM based communication system, employing the chaotic carrier generated by the Burger’s map is proposed. To highlight the security aspect a new measure called ‘Bit Power Parameter Spectrum’ (BPPS) is introduced. The BPPS is then used to identify parameters that provide high secure and insecure regions for the chaotic map. Furthermore, it is demonstrated how a binary message can be decrypted easily if the parameters of the map exist in the insecure region of the BPPS and how security is optimised if the parameters exist in the secure region of the BPPS. The results are contrasted with those of the standard Lorenz CPM based system. The BPPS measure shows that the Lorenz CPM based system is easily decrypted for nearly all parameter values thus rendering the carrier insecure.

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Paper Citation


in Harvard Style

Jovic B. and Unsworth C. (2007). IMPROVING SECURITY IN CHAOTIC SPREAD SPECTRUM COMMUNICATION SYSTEMS WITH A NOVEL ‘BIT POWER PARAMETER SPECTRUM’ MEASURE . In Proceedings of the Second International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2007) ISBN 978-989-8111-12-8, pages 273-280. DOI: 10.5220/0002125302730280


in Bibtex Style

@conference{secrypt07,
author={Branislav Jovic and Charles Unsworth},
title={IMPROVING SECURITY IN CHAOTIC SPREAD SPECTRUM COMMUNICATION SYSTEMS WITH A NOVEL ‘BIT POWER PARAMETER SPECTRUM’ MEASURE},
booktitle={Proceedings of the Second International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2007)},
year={2007},
pages={273-280},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002125302730280},
isbn={978-989-8111-12-8},
}


in EndNote Style

TY - CONF
JO - Proceedings of the Second International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2007)
TI - IMPROVING SECURITY IN CHAOTIC SPREAD SPECTRUM COMMUNICATION SYSTEMS WITH A NOVEL ‘BIT POWER PARAMETER SPECTRUM’ MEASURE
SN - 978-989-8111-12-8
AU - Jovic B.
AU - Unsworth C.
PY - 2007
SP - 273
EP - 280
DO - 10.5220/0002125302730280