Abstract
In this paper, a four-scroll chaotic attractor is generated based on a switched system, and moreover, it is applied to color image encryption. First, the canonical Chen system and a modified chaotic system are used as two subsystems to construct the switched system. Meanwhile, a state-dependent switching law with a threshold is designed to regulate the switching between the two subsystems. Then, a four-scroll chaotic attractor is generated by tuning the threshold value. Last, the chaotic sequence extracted from the switched chaotic system is applied to image encryption. The experimental results show that the encryption performance of this switched chaotic system is better than that of a single Chen system.
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