关键词: 虚拟光学, 透镜成像, 加密系统, 时空混沌

Abstract: The random mask of virtual optical encryption system is a 2-D matrix, it occupies too much memory space. In allusion to the fact that spatiotemporal chaotic system produces a large number of uncorrelated pseudo-random sequences and is very sensitive to the chaotic initial value and control parameters, a novel encryption scheme combines spatiotemporal chaotic system with virtual optical lens imaging encryption technique. In this scheme, some spatiotemporal chaotic sequences are generated to encrypt important information safely. Three parameters of spatiotemporal chaotic system take the place of random mask and reduce memory space. The simulation results reveal that the key of this encryption scheme has high precision and this encryption scheme can resist brute force attack in certain key space.

Key words: virtual optical, lens imaging, encryption system；spatiotemporal chaos