scholarly journals A novel scheme for lossless authenticated multiple secret images sharing using polynomials and extended visual cryptography

2020 ◽  
Author(s):  
Krishnaraj Bhat ◽  
Uday Kumar Reddy K.R. ◽  
Ranjan Kumar H.S. ◽  
Dindayal Mahto
Keyword(s):  
Visual Cryptography ◽  
Multiple Secret Images

Multi-Secret Sharing Visual Cryptography Scheme Based on XOR Algorithm

2014 ◽  
Vol 644-650 ◽  
pp. 2108-2111 ◽  
Author(s):  
Yan Yan Ha ◽  
Shuai Ji ◽  
Wen Cai He ◽  
Yao Zhang
Keyword(s):  
Secret Sharing ◽  
Visual Cryptography ◽  
Pixel Expansion ◽  
Visual Cryptography Scheme ◽  
Multi Secret Sharing ◽  
Multiple Secret Images

XOR algorithm can be used to improve the recovery effects of visual cryptography scheme. In this paper, we present a multi-secret visual cryptography scheme by using the matrices of the (k, k)-VCS. We can reveal multiple secret images perfectly by the XOR algorithm and shifting operation on the shares. The visual qualities of recovered images are ideal without any pixel expansion.

scholarly journals A Modified Multi-Secret Visual Cryptography with Ring Shares

2012 ◽  
Vol 6-7 ◽  
pp. 343-349
Author(s):  
Zheng Xin Fu ◽  
Bin Yu
Keyword(s):  
Secret Sharing ◽  
Visual Cryptography ◽  
Relative Difference ◽  
Pixel Expansion ◽  
Visual Cryptography Scheme ◽  
Multiple Secret Images

A visual cryptography scheme encoding multiple secret images into two ring shares is proposed in this paper. In the secret sharing process, two shares are produced by the marked areas and the basis matrices of (2, 2)-VCS. Using ring shift right function, the secret images are recovered by stacking two shares. The security and contrast properties of the scheme have been proved. Compared with the previous ones, the scheme makes the number of secret images unlimited. Furthermore, the pixel expansion and the relative difference are improved greatly.

Security Concern and Countermeasures for Cheating in Visual Cryptography

2018 ◽  
Vol 6 (8) ◽  
pp. 277
Author(s):  
Ekta Y
Keyword(s):  
Communication System ◽  
Visual Cryptography ◽  
Detection Methods ◽  
Information Communication ◽  
New Approach ◽  
The World ◽  
Visual Cryptography Scheme ◽  
Prevention Methods ◽  
Security Concern

As IT sector is ruling the world now,confidentiality and security of information has become the most important inseparable aspect in information communication system. Keeping in view the same, a new approach called Visual Cryptography (VC) has been suggested by many researchers but there are some limitations with this scheme and cheating is one of the main problem among them. This paper intends to show the basis of cheating in VC in terms of cheating process, its detection methods and its prevention methods suggested by various researchers along with their merits and demerits. Finally, a good Cheating Immune Visual Cryptography Scheme (CIVCS) has been discussed which states the properties to be adopted by every Visual Cryptography scheme to make it immune to cheating attacks.

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