Encryption and Decryption of Optical Images with Different Algorithms

Abstract

While digital images are the most common expression of information on the internet, their security is of great concern, and image encryption technology is a key technology to ensure the security of images. Several kinds of image encryption and decryption methods were used to explore the encryption and decryption of optical images using MATLAB: randomly disrupting the row or column of each layer; randomly disrupting the pixel points; scaling the RGB values of pixel points; transposing, horizontal flipping and vertical flipping of RGB matrixes; and the one-dimensional and two-dimensional data reset of images. Different encryption algorithms have different image encryption effects and operating speeds. The research is to better assess this technology for beginners who are interested in image encryption and decryption technologies and to lay the foundation for these individuals to develop more advanced encryption and decryption technologies in the future. It is proved that these algorithms can be applied to image data protection.