Authors

1. Mr. Satyendra Nath Mandal
2. Mr. Subhankar Dutta
3. Mr. Ritam Sarkar

Affiliation

• Dept. of I.T, Kalyani Govt. Engg College, Kalyani, Nadia(W.B)
• Dept. of CSE, Kalyani Govt. Engg College, Kalyani, Nadia(W.B)
• Dept. of CSE, Kalyani Govt. Engg College, Kalyani, Nadia(W.B)

Abstract

Visual cryptography is a method for protecting image-based secrets that have a computation-free decoding process. In this technique, number of shares are generated from one image. The shares are sent to the receiver and the receiver generates the original image by stacking all the share images. The method is fair but wasting the bandwidth of the network. The technique of generating shares is different in different types of images like binary, gray and color images. In this paper, an algorithm has been proposed to convert image in encrypted form and decrypt the image into original form. The key of encryption and decryption has been generated automatically using a real number. This number can be predefined or can be sent by any means to the receiver. The proposed algorithm can be applied to any type of image i.e. binary, gray scale and color image. The distribution of pixels in encrypted image is quite similar to a single share. Finally, it has been proved that the proposed approach is much simpler, secure and consumes less bandwidth of network.

Keywords

Visual Cryptography, , Share, , bandwidth, , Encryption, , Decryption, , Binary,, Gray and Color Image.

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