高效彩色图像无损认证加密算法的研究  

Research on high-efficiency lossless color image authentication encryption algorithm

作　　者：宋佳烁 丁海洋[1] 李子臣[1] Song Jiashuo;Ding Haiyang;Li Zichen(Digital Rights Management Research Center,Beijing Institute of Graphic Communication,Beijing 102600,China)

机构地区：[1]北京印刷学院数字版权保护技术研究中心,北京102600

出　　处：《计算机应用研究》2022年第2期582-586,共5页Application Research of Computers

基　　金：国家自然科学基金资助项目(61370188);北京市教委科研计划资助项目(KM202010015009);北京市教委科研计划资助项目(KM202110015004);北京印刷学院博士启动金资助项目(27170120003/020);北京印刷学院科研创新团队项目(Eb202101)。

摘　　要：针对图像在加密过程中可能存在的信息丢失及安全性不高等问题进行研究,提出了一种基于AEGIS的彩色图像无损认证算法。该算法利用图像的文件头得到初始状态,通过AEGIS内部的状态更新对图像的加密,然后将状态更新后生成的认证标签隐藏到密文图像中,解密时从密文图像中提取标签并通过AEGIS恢复图像,实现了认证功能,保证了图像的真实性和完整性。与其他图像加密算法相对比,该算法运算效率高,密文图像含有信息量低。实验结果表明,该算法可以实现彩色图像的快速无损认证加密和解密。Aiming at the problems of possible information loss and low security in the process of image encryption,this paper proposed a color image lossless authentication algorithm based on AEGIS.The algorithm used the file header of the image to get the initial state,encrypted the image by updating the internal state of AEGIS,then hided the authentication label generated by the status update into the encrypted image,extracted the label from the encrypted image during decryption and restored the image by AEGIS.It achieved the authentication function and guaranteed the authenticity and integrity of the image.Comparing with other image encryption algorithms,this algorithm had higher computational efficiency and lower amount of information contained in ciphertext images.The experimental results show that the algorithm can achieve fast lossless authentication encryption and decryption for color images.

关 键 词：图像加密 AEGIS认证算法 无损恢复 信息隐藏 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]