Improving the visual quality of a size deterministic visual cryptography scheme for Grayscale Images

Abstract

To enhance the security choices in transmission of information over the web, various methods such as cryptography, steganography and digital watermarking have been developed. Visual cryptography has developed in the past decade as an entity that splits the information into two parts in order to complete integration. This system is also secured in a lesser quantity. In this paper a secret message multi-share method is used. In the proposed work input picture is divided into eight portions. The eight portions shares are encrypted before embedding the image in the patchwork image, photo sharing and the image retrieved is the same as the hidden starting image. Results show that the proposed method has optimized the optimal time by 8%, improved PSNR by 11% and lower overhead communication.

Subject Classification:

• 68M10
• 68M12
• 68M15

Keywords:

• Cryptography
• Security
• Image
• PSNR