Modified LSB Watermarking for Image Authentication

This paper mainly aims at developing an authentication scheme for digital images. The LSB scheme is chosen base for our proposed work. Through literature survey it is found that conventional LSB scheme provides low embedding rat low distortion and is irreversible. Because of its irreversibility, the conventional LSB scheme cannot be used for critic applications where reversibility is mandatory. Through this literature survey, we learnt that this conventional LSB scheme us only one bit in every pixel for embedding. Our proposed scheme presents a modified LSB embedding strategy that satisfies th reversibility and improves the embedding rate by using two bits in every pixel for embedding

Cheating Resistance and Reversibility Oriented Secret Sharing Mechanism

[[abstract]]The secret-sharing mechanism has been widely applied to the e-commerce, communications and multimedia fields. With sufficient shares, the involved participants can cooperate to reveal secret data. Fraudulent participants, however, may provide a fake shadow in order to fool others. Consequently, cheating prevention has become a critical essential for secret sharing systems. In this article, the authors propose an efficient image secret sharing scheme that can resist cheating attacks. The simulator shows that the novel scheme is sensitive to cheating detection and cheater identification. In particular, the new method allows an authorised participant to reveal a lossless secret image and to further restore the valued host image without distortion. The reversibility of the secret sharing system provides practicability and widespread potential for preserving medical images, military images and artistic images