Visual Cryptography for Multiple Secrets

2018 ◽  
pp. 87-123
Author(s):  
Shyong Jian Shyu
Keyword(s):  
Visual Cryptography ◽  
Multiple Secrets

Sharing Multiple Digital Images via Halftoning Methods

2012 ◽  
Vol 182-183 ◽  
pp. 1992-1997
Author(s):  
Kai Hui Lee ◽  
Pei Ling Chiu
Keyword(s):  
Secret Sharing ◽  
Visual Cryptography ◽  
Encryption Algorithm ◽  
Visual Secret Sharing ◽  
Pixel Expansion ◽  
Binary Images ◽  
Multiple Secrets ◽  
Image Area ◽  
Display Quality ◽  
Encryption Method

The visual secret sharing for multiple secrets (VSSM) technique allows for the encryption of more than one secret images in a given image area. Previous research on VSSM schemes has a pixel expansion problem that limits the capability to increase the capacity of secret image encryption. Moreover, the VSSM schemes focus on sharing binary images to date. These drawbacks limit the applicability of existing VSSM schemes. In this study, we propose a novel encryption algorithm to address these problems. The proposed algorithm adopts a visual cryptography (VC)–based encryption method that can eliminate the pixel expansion problem and is applicable to halftone secret images. The experimental results demonstrate that the proposed approach not only can increase the capacity of VSSM schemes, but also can maintain an excellent level of display quality in the recovered secret images.

Sharing multiple secrets in visual cryptography

2007 ◽  
Vol 40 (12) ◽  
pp. 3633-3651 ◽  
Author(s):  
Shyong Jian Shyu ◽  
Shih-Yu Huang ◽  
Yeuan-Kuen Lee ◽  
Ran-Zan Wang ◽  
Kun Chen
Keyword(s):  
Visual Cryptography ◽  
Multiple Secrets

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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