Design and Implementation of a (2, 2) and a (2, 3) Visual Cryptographic Scheme | Zendy

Ujjwal Chakraborty | Zendy; Jayanta Kumar Paul | Zendy; Priya Ranjan Sinha Mahapatra | Zendy

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Design and Implementation of a (2, 2) and a (2, 3) Visual Cryptographic Scheme

Author(s) -

Ujjwal Chakraborty,

Jayanta Kumar Paul,

Priya Ranjan Sinha Mahapatra

Publication year - 2010

Publication title -

international journal of computer and communication technology

Language(s) - English

Resource type - Journals

eISSN - 2231-0371

pISSN - 0975-7449

DOI - 10.47893/ijcct.2010.1047

Subject(s) - pixel , visual cryptography , computer science , image (mathematics) , scheme (mathematics) , dimension (graph theory) , computer vision , artificial intelligence , cryptography , block (permutation group theory) , process (computing) , mathematics , algorithm , secret sharing , mathematical analysis , geometry , pure mathematics , operating system

In this paper two methods for (2, 2) and (2, 3) visual cryptographic scheme(VCS) is proposed. The first scheme considers 4 pixels of input image at a time and generates 4 output pixels in each share. As 4 output pixels are generated from 4 input pixels dimension and aspect ratio of the decrypted image remain same during the process. The second scheme considers 2 pixels (1 block) of input image at a time and generates 3 output pixels in each share. Here probability of /3 for black pixel is maintained in each share. The scheme improves the contrast of output image. The dimension of revealed image is increased by 1.5 times in horizontal direction and remains same in vertical direction.

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