基于奇异值分解的二维码加密算法

Two-dimensional Code Encryption Algorithm Based on Singular Value Decomposition

随着移动互联网和智能手机的快速发展,人们对网络中信息传输的安全性的要求越来越高。二维码作为一种存储和识别信息的技术已经在很多领域有着广泛的应用。但是二维码编码算法是公开的且未实现信息加密,在一些领域中存在信息安全问题。文中通过研究二维码编码规则及加密算法,提出一种基于奇异值分解的改进算法来对编码数据信息加密。通常,计算机存储数字化的图像文件是通过矩阵的方式,因此,图像对应的坐标像素的值都可以用矩阵的元素表示,计算机对数字图像的处理过程就是对这些非负矩阵进行运算。解密是加密的逆过程,即对图片矩阵进行奇异值分解加密,以及加密解出明文信息。实验证明,所提方法加、解密的效率高,安全性好。

With the rapid development of mobile Internet and smart phone,the security of information transmission in network is more and more important.As a new technology of information storage,transmission and recognition,two-dimensional code has been widely applied in many fields.However,because the two-dimensional code coding algorithm is open and its information encryption is unimplemented,there are information danger in some areas.In this paper,a new algorithm based on singular value decomposition(SVD)was proposed to encrypt encoded data through the study of two-dimensional code coding rules and encryption algorithms.Usually the digital image files in our computer is stored in the form of matrix,and each element of the matrix is also expressed in the corresponding image coordinates of pixel va-lue.Therefore,through the computer digital image processing,there is actually a series of non negative matrix operations.Decryption is the inverse process of encryption,by obtaining the singular value decomposition and encryption of the picture matrix,and the encrypted solution of the plaintext information.The experiment shows that this method is efficient in encryption and decryption,and has good security.