一种新的基于可逆矩阵的具有完整性检验能力的图像加密方案

A novel image encryption scheme with the capability of checking integrity based on inverse matrix

为了保护图像信息的安全,论文利用组合理论知识,提出一种新的基于可逆整数矩阵的、具有完整性检验能力的图像加密方案。应用该方案将一个灰度图像加密生成一个脆弱的噪声密图,解密过程是加密的简单逆过程。密图的完整性可以凭借人类视觉系统进行检验,不需要任何复杂的计算。当密图遭受恶意篡改时,解密得到一个噪声图,无法得到原始图像的任何信息。论文加密方案的密钥简单,且密钥空间足够大。理论分析和实验结果证明了,该方案为图像加密提供了一种高安全性和有效的机制。

In this paper,a novel image encryption scheme with the capability of checking integrity based on inverse matrix is proposed for image security by utilizing combinatorial theory.A fragile and noised cipher-image is yielded by applying this scheme to grey-level image.Decryption is a simple reversed process of encryption.The integrity of cipher-image can be checked by human visual system without any complicated computations.When the cipher-image is tempered,we cannot gain any information about the secret image except a noised image.The key is simple and large enough.Theoretical analysis and experimental results demonstrate that the proposed scheme offers a high secure and effective mechanism for image encryption.