LAUSR

The primary aim of this paper is to provide an efficient encryption algorithm for RGB images. A new, fast, and secure RGB image encryption algorithm using generalized Vigenére table over the symmetric group Sn$S_{n}$ associated with Virtual Planet Domain (VPD) is proposed. Also a new method to generate random key space using generalized Vigenére cipher is introduced. Randomness of the proposed key space has been verified by using NIST statistical test suite. A formula for the key space has also been obtained and it is shown that this key space resists brute force attack. The VPD has been designed to encode RGB image into VPD, which provides a fine interlacing among binary bit for each pixel. The proposed algorithm has been tested on standard RGB images. Robustness of the proposed algorithm has been successfully verified by using commonly known attacks (such as, differential, cropped, and noise, entropy attacks). Finally, the proposed technique has been compared with other existing algorithms and the data (shown in tables) confirm that the proposed algorithm is competitive and can resist exhaustive attacks efficiently.