Title :
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
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;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2008.2003346
