摘要
以单向流耦合映像格子时空混沌系统模型为基础,采用驱动-响应同步方法达到时空混沌同步,利用时空混沌序列具有复杂度高、伪随机性好、宽频谱的特点,实现对数字图像在扩展频谱基础上的保密传输,使加密信号有较强的抗破译能力。计算机仿真结果证实了利用该方法进行数字图像保密通信的有效性。
The synchronization of a kind of spatio-temporal chaotic system, one-way coupled map lattices, is studied based on active-passive method in this paper. Using characteristic of chaotic sequences' high complexity, like-noise and wide band, the digital image is transmitted in security with spatio-temporal chaotic signals by means of spread spectrum. The communication system is safer against external imitations and attacks than the low-dimensional chaos currently proposed for secure communication. The simulation results of digital image secure communication show that the presented technique is effective and can be applied in digital secure communication system.
出处
《通信学报》
EI
CSCD
北大核心
2002年第9期69-73,共5页
Journal on Communications
关键词
数字图像
保密通信
时空混沌
耦合映像格子
spatio-temporal chaos
coupled map lattices
image secure communication
