Chaotic Cryptographic to Maintain Security and Authentication of Gray Scale Image by Secret Sharing
Kondapalli Venkata Ramana, K. Usha Rani · 2013
In this paper we proposed a chaotic authentication mechanism for gray scale image by secret sharing by using some of the cryptographic techniques. Recent researches of image encryption algorithms have been increasingly based on chaotic systems, but the drawbacks of small key space and weak security in one-dimensional chaotic cryptosystems are obvious. We present a new nonlinear chaotic algorithm (NCA) which uses power function and tangent function instead of linear function. Its structural parameters are obtained by experimental analysis and an image encryption algorithm in a one-time-one password system is designed. Compared with some general encryption algorithms such as DES, the encryption algorithm is more secure. We review the main achievements in the field of chaotic cryptography, starting with the definition of chaotic systems and their properties and the difficulties it has to outwit. The major advantages and drawbacks of the most popular chaotic map ciphers in terms of security and computational cost are analyzed. The most significant cryptanalytic techniques are considered and applied for testing the security of some chaotic algorithms. This secret sharing scheme is useful for reducing the risk of incidental partial data loss. This paper also presents the security issues and discuss on keeping high quality visual effect.