View article

With the rapid growth of internet technology, services and devices, transferring of images over internet becomes increasingly popular. This paper proposes a watermarking using binary scheme and transparency authentication scheme used in visual cryptography. Watermarking using binary scheme offers better security than Hwang’s method, so that ownership information will not be detected by the attackers. In addition, transparency authentication scheme is embedded in the same image, so that secret image can be perceptible when stacking transparency. In authentication scheme, the Watermark image is half of the size of the secret image and both are encrypted at the same time. Experimental results shows that the scheme effective and practical.