关键词: 信息安全, 图像加密, 混沌, 混沌映射

Abstract: This paper proposes a new image encryption approach based on chaotic map pattern.By the idea of SCAN pattern the paper takes the left map and right map of five chaotic maps as ten patterns.Those patterns can be used in image encryption.Here the types of the patterns are used as the keys.Simulation shows that the image encryption approach has fast encryption speed and high security.The approach solves the limit between the keys and the size of image when encrypting image by chaotic map.At the same time it also solves the limit of the size of image required by SCAN pattern.It is a promising encryption technology.

Key words: information security, image encryption, chaos, chaotic map