中国物理B ›› 2014, Vol. 23 ›› Issue (5): 50507-050507.doi: 10.1088/1674-1056/23/5/050507
齐国元, Sandra Bazebo Matondo
Qi Guo-Yuan (齐国元), Sandra Bazebo Matondo
摘要: In this paper, during the masking process the encrypted message is convolved and embedded into a Qi hyper-chaotic system characterizing a high disorder degree. The masking scheme was tested using both Qi hyper-chaos and Lorenz chaos and indicated that Qi hyper-chaos based masking can resist attacks of the filtering and power spectrum analysis, while the Lorenz based scheme fails for high amplitude data. To unmask the message at the receiving end, two methods are proposed. In the first method, a model-free synchronizer, i.e. a multivariable higher-order differential feedback controller between the transmitter and receiver is employed to de-convolve the message embedded in the receiving signal. In the second method, no synchronization is required since the message is de-convolved using the information of the estimated derivative.
中图分类号: (Communication using chaos)