The security of two kinds of image encryption methods is analyzed, and an improved image encryption algorithm is proposed. 摘要在对现有的两类图像加密方法安全性分析的基础上，提出了一种改进的图像加密方法。
Based on bilateral diagonal stretch, this paper proposes a new invertible two-dimensional map which can be used in image encryption. 摘要利用双边对角线拉伸的思想，提出一种利用图像加密的可逆二维混沌映射。
