Provided by: Science & Engineering Research Support soCiety (SERSC)
Date Added: Apr 2010
Visual cryptography scheme is a cryptographic technique which allows visual information (e.g. printed text, handwritten notes and picture) to be encrypted in such a way that the decryption can be performed by the human visual system, without the aid of computers. There are various measures on which performance of visual cryptography scheme depends, such as pixel expansion, contrast, security, accuracy, computational complexity, share generated is meaningful or meaningless, type of secret images (either binary or color) and number of secret images (either single or multiple) encrypted by the scheme.