Information Protection Service using Topological Image Coverage

Information protection services based on the use of elements of the RSA algorithm are quite reliable because the cryptostability of this method is high (RSA keys from 2048 bits and more). However, in terms of image encryption, in some cases, this algorithm leaves outlines of objects in an encrypted image. This imposes a number of additional limitations on the application of this algorithm. Avoiding partially saving contours in encryption using RSA can be by splitting the initial image into parts so that the image coating is topologically locally finite, that is, compact. The paper proposes a method of encryption-decryption using elements of the RSA algorithm and the topological image coverage. Such a combination will provide both a avoiding of the aforementioned disadvantage and an additional increase in cryptostability. The simulation of the method was done on grayscale and color images using two developed algorithms. The absence of contours of objects of input images in encrypted images of both types is experimentally established. The proposed solution can be used for any type of image, but the greatest benefits are achieved when using images with fluctuation intensity function.