Enhanced image secret sharing via error diffusion in halftone visual cryptography

2011 ◽  
Author(s):  
Nitty Sarah Alex ◽  
L. Jani Anbarasi
Keyword(s):  
Secret Sharing ◽  
Visual Cryptography ◽  
Error Diffusion ◽  
Image Secret Sharing

A novel two-in-one image secret sharing scheme based on perfect black visual cryptography

2016 ◽  
Vol 14 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Peng Li ◽  
Ching-Nung Yang ◽  
Qian Kong
Keyword(s):  
Secret Sharing ◽  
Visual Cryptography ◽  
Secret Sharing Scheme ◽  
Sharing Scheme ◽  
Image Secret Sharing

scholarly journals Flip Extended Visual Cryptography for Gray-Scale and Color Cover Images

Symmetry ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 65
Author(s):  
Lu Wang ◽  
Bin Yan ◽  
Hong-Mei Yang ◽  
Jeng-Shyang Pan
Keyword(s):  
Privacy Protection ◽  
Visual Cryptography ◽  
Color Images ◽  
Cover Image ◽  
Error Diffusion ◽  
Gray Scale ◽  
Secret Image ◽  
Transaction Security

Visual cryptography (VC) has found numerous applications in privacy protection, online transaction security, and voting security, etc. To counteract potential cheating attacks, Lin et al. proposed flip visual cryptography in 2010, where a second secret image can be revealed by stacking one share with a flipped version of another share. The second secret image can be designed as an additional verification mechanism. However, Lin’s scheme produces meaningless shares and is only applicable to binary secret images. It is interesting to explore whether it is possible to extend the flip VC to having cover images (i.e., extended VC) and these cover images are color images. This problem is challenging since too many restricting conditions need to be met. In this paper, we designed a flip VC for gray-scale and color cover images based on constraint error diffusion. We show that it is possible to meet all the constraints simultaneously. Compared with existing schemes, our scheme enjoys the following features: Color cover images, no computation needed for decoding, and no interference from cover image on the recovered secret image.

Visual Cryptography from Halftone Error Diffusion

2018 ◽  
pp. 32-60
Author(s):  
Gonzalo R. Arce
Keyword(s):  
Visual Cryptography ◽  
Error Diffusion

scholarly journals VISUAL CRYPTOGRAPHY FOR COLOR IMAGES

2013 ◽  
pp. 147-149
Author(s):  
ASHWATHIMESANGLA AO
Keyword(s):  
Secret Sharing ◽  
Visual Cryptography ◽  
Color Images ◽  
Secret Sharing Scheme ◽  
Secret Image ◽  
Secret Information ◽  
Host Image ◽  
Sharing Scheme ◽  
Visual Cryptography Scheme

Visual cryptography is a secret sharing scheme for encrypting a secret image, it is a perfectly secure way that allows secret sharing without any cryptographic computation, which is termed as Visual Cryptography Scheme (VCS). In this paper secret image is divided into shares (printed on transparencies), and each share holds some information. At the receiver this shares are merged to obtain the secret information which is revealed without any complex computation. The proposed algorithm is for color host image, divided into three color planes Red, Green, Blue and merged with secret image which is binarized and divided into shares. The decoding requires aligning the result obtained by merging color host image and shares, so as to obtain the secret image.

An Optimized Halftone Visual Cryptography Scheme Using Error Diffusion

2018 ◽  
Vol 77 (19) ◽  
pp. 24937-24953 ◽  
Author(s):  
Mahmoud E. Hodeish ◽  
Vikas T. Humbe
Keyword(s):  
Visual Cryptography ◽  
Error Diffusion ◽  
Visual Cryptography Scheme
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