Proficient Evaluation of Visual Cryptography using Transposition Cipher and Bit Reversal Techniques

Abstract

This paper aims to secure visual information present in an image using cryptographic techniques. Transposition cipher and Bit reversal image encryption are the two techniques demonstrated in this paper and have implemented the same using python programming knowledge. The transposition cipher refers to scrambling of pixels in a key controlled manner in both horizontal and vertical ways. The used in this inscription can be provided by users. To hide information regarding the color composition of the image, a bit reversal image encryption algorithm is implemented which is a keyless encryption technique. Furthermore, this paper compares the original image and the image encrypted with transposition cipher and bit reversal technique and comparative measurements of entropy, PSNR, MSE and SSIM are computed.