Cryptanalysis of Chaotic Masking Secure Communication Systems Using an Adaptive Observer

Author

Liu, Ying ; Tang, Wallace K S

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong

Volume

55

Issue

11

fYear

2008

Firstpage

1183

Lastpage

1187

Abstract

This paper carries out a further cryptanalysis of two Lorenz-based masking secure communication systems, which have been recently attacked by a high-pass filter. As demonstrated with our simulations, high-pass filter attack works well only when the covered information signal is monotonic. However, with an adaptive observer, it is still possible to coarsely obtain the information signal and correctly identify the system user-defined parameters if a multitonic information signal is transmitted, making the security of these two systems questionable.

Keywords

chaotic communication; cryptography; high-pass filters; observers; telecommunication security; Lorenz-based chaotic masking scheme; adaptive observer design; cryptanalysis; high-pass filter attack; monotonic signal; multitonic information signal; secure communication systems; user-defined parameters; Adaptive systems; Chaotic communication; Communication system security; Communication systems; Equations; Filters; Information security; Minimization methods; Observers; Signal processing; Adaptive observer; adaptive synchronization; cryptanalysis; minimization algorithm; secure communication;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2008.2003346

Filename

4703540