Value combination technique for image authentication

Abstract

Value Combination Technique is proposed for a novel bitmap exact authentication. It combines the pixel values in an image block with the block position, and the combined values are used as the initial state of chaotic system to generate watermark. Furthermore, a general rule is given to analyze the reliability of algorithm, and another rule is presented to design an algorithm with high reliability in this paper. Then, a concrete algorithm illustrates our proposed authentication system. Extensive experiments show that this system can effectively resist such as feature extraction attack, vector quantization attack and so on, and be very sensitive to tamper. © Springer-Verlag Berlin Heidelberg 2007.