Secure Visual Cryptography Technique for Color Images Using RSA Algorithm
Manika Sharma, Rekha Saraswat · 2013
Visual Cryptography is a special technique which is used to send the images securely over the network. Visual cryptography is a cryptographic technique which allows visual information to be encrypted in such a way that decryption becomes a mechanical operation that does not require a computer. Simple Visual Cryptographic technique is insecure. This cryptographic technique involves dividing the secret image into n shares and a certain number of shares (m) are sent over the network. The decryption process involves stacking of the shares to get the secret image. In the current work, we have proposed a cryptographic technique for color images where we are using color error diffusion with XOR operation. The shares are developed using Random number. The key generated for decryption process is sent securely over the network using RSA algorithm. This approach produces less distorted image and the size of the decrypted images is same as the original image.