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Authors: Branislav Jovic 1 and Charles Unsworth 2

Affiliations: 1 University of Auckland, New Zealand ; 2 Univesity of Auckland, New Zealand

ISBN: 978-989-8111-12-8

Keyword(s): Security, Spread Spectrum, Communications, Chaos, PC Synchronization, Bit Power Parameter Spectrum.

Related Ontology Subjects/Areas/Topics: Cryptographic Techniques and Key Management ; Information and Systems Security ; Spread Spectrum Systems

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. (More)

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Paper citation in several formats:
Jovic B.; Unsworth C. and (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

@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},
}

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

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