Hybridization of Symmetric Key Encryption and Visual Cryptography

摘要

Visual cryptography technique encipherthe visual information in such a way, that deciphercan be performed by human visual system without any complex decoding process . As visual cryptography, is a secure tacticsfor transmitting visual information but, if anyone gets access to all shares, he/she can reveal out the secret easily. In this paper a more impregnablevisual cryptography scheme is proposed. This technique first encrypts the secret using a symmetric key and then divides the secret into shares. After stacking of shares, secret doesnot appear, until the symmetric key is not known. This technique is proposed for binary images. Here the symmetric key used for encryption and decryption isa small binary image