基于单像素成像和公钥密码的图像加密技术  被引量:8

Image Encryption Technology Based on Single Pixel Imaging and Public Key Cryptography

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作  者:蒋新竹 袁胜 JIANG Xinzhu;YUAN Sheng(School of Information Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450000,China)

机构地区:[1]华北水利水电大学信息工程学院,河南郑州450000

出  处:《电力信息与通信技术》2022年第5期87-94,共8页Electric Power Information and Communication Technology

摘  要:针对现有单像素加密技术大多基于对称加密、传输密钥量过大等不足,文章提出了一种基于单像素成像和公钥密码的图像加密技术,首先利用2组随机数分别作为哈达玛矩阵(Hadamard)的行序列和列序列,对其进行扰乱,随后利用数字微镜将扰乱后的正交矩阵作为调制模板投射到秘密图像上,通过单像素探测器进行探测获取密文,并利用RSA加密算法中的公钥对2组随机数进行加密,完成加密过程。秘密信息的解密过程是加密的逆过程。仿真实验证明,该方法在攻击者窃听率达到50%仍能保证秘密信息不泄露,还原图像清晰可见,并对统计学攻击和唯密文攻击都有一定的抵抗能力,在遭受椒盐、高斯等常见噪声攻击后,还原图像仍可辨认出原始信息,有非常良好的鲁棒性。本方法使用公钥密码加密,提高了系统安全性;通过随机序列产生随机正交矩阵,在保证解密图像质量的前提下,减少了密钥量,提升了加密效率。In view of the shortcomings of the existing single pixel encryption technologies,such as symmetric encryption and excessive amount of transmission keys,this paper proposes an image encryption technology based on single pixel imaging and public key cryptography.First,two groups of random sequence are used as row sequence and column sequence of Hadamard matrix respectively.Then,a digital micromirror device(DMD)is used to project the perturbed matrix as a modulation template onto the secret image,a single pixel detector is used to detect and obtain the ciphertext,and the RSA public key is used to encrypt two groups of random sequence to complete the encryption process.The decryption process is the reverse process of encryption.Experiments result shows that secret information is security guaranteed even when the eavesdropping rate of attackers reaches 50%.The restored image of this method is clearly visible,and it has certain resistance to statistical attack and ciphertext attack.And it has very good robustness,the original information can still be recognized in the restored image after being attacked by Salt,Gauss and other common noise attacks.In this method,public key cryptography is used to improves system security.On the premise of ensuring the quality of the decryption image,the amount of key is reduced and the encryption efficiency is improved by generating random matrix from random sequence.

关 键 词:单像素成像 图像加密 HADAMARD矩阵 公钥密码 

分 类 号:TN918.4[电子电信—通信与信息系统]

 

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