Visual Cryptography is based on cryptography where n images are encoded in a way that only the human visual system can decrypt the hidden message without any cryptographic computations when all shares are stacked together. This paper presents an improved algorithm based on Chang’s and Yu visual cryptography scheme for hiding a colored image into multiple colored cover images. This scheme achiev...

Protection of biometric data is of prime importance now a days. In this paper a new method is proposed for the protection of biometric facial data using visual cryptography and chaotic encryption. By using visual cryptography each private face image is decomposed into two public host images. The original image gets revealed only when both of these images are available simultaneously. By using c...

This paper proposed a new algorithm for digital image encryption. The proposed algorithm encrypts an mxn size image by using the set of array pixel values. At the end, plain images will be encrypted using the algorithm and analysis will be performed on the ciphered images to determine the efficiency of the algorithm in ciphering the image. The algorithm ultimately makes it possible for encrypti...

Due to the rapid growth of digital communication and multimedia application, security becomes an important issue of communication and storage of images. Encryption is one of the ways to ensure high security images are used in many fields such as medical science, military.Modern cryptography provides essential techniques for securing information and protecting multimedia data. In recent years, e...

Recently, a RGB image encryption algorithm based on DNA encoding and chaos map has been proposed. It was reported that the encryption algorithm can be broken with four pairs of chosen plain-images and the corresponding cipher-images. This paper re-evaluates the security of the encryption algorithm, and finds that the encryption algorithm can be broken efficiently with only one known plain-image...

This new algorithm performs lossless image encryption by combining variable-length key-dependent XOR encryption with S-box substitution. This algorithm was implemented and tested by performing different permutations of XOR encryption and S-box substitution. Empirical analysis using different types of test images of different sizes showed that this new algorithm is effective and resistant to sta...