An extensive review on visual cryptography schemes

Ramya, J.; Parvathavarthini, B.

doi:10.1109/iccicct.2014.6992960

Cited by 11 publications

(2 citation statements)

References 32 publications

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“…There are numerous types of VC schemes. For example, there is the k-out-of-n scheme, in which k refers to the number of shares that should be stacked to decrypt the secret image, and n refers to the shares that will be produced, 2-out-of-2 and n-out-of-n [10]. In this paper, the 2-out-of-2 scheme is selected due to its transparency in terms of describing the idea of VC and the security level that can be provided.…”

Section: A Vc Schemes In Use: An Overviewmentioning

confidence: 99%

Developing a Visual Cryptography Tool for Arabic Text

Alsuhibany

2019

IEEE Access

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Over the years, cryptography has been used to encrypt secret data. A new version of cryptography, entitled visual cryptography (VC), has been introduced. This approach is a simple and secure way to allow the secret sharing of images without any cryptographic computations or the use of encryption or decryption keys. Although various studies have been undertaken with regard to improving the VC technique, there has not yet been a study attempting to improve the VC technique for Arabic text although there are thousands of websites that provide services in Arabic serving countries in which Arabic is spoken as a first language. This paper, therefore, develops a tool that can encrypt/decrypt images of Arabic text using the VC approach. We experimentally evaluate the usability aspect. The results indicate the general suitability of the developed tool. This tool sheds light in designing practical tools for electronic voting, antiphishing, Captcha, watermarking, biometric privacy, online payment systems, and digital signature in the Arabic environment.

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Section: A Vc Schemes In Use: An Overviewmentioning

confidence: 99%

Developing a Visual Cryptography Tool for Arabic Text

Alsuhibany

2019

IEEE Access

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“…The recovered image has less contrast and experiences a loss of resolution as compared to secret image. This parameter also reflects upon the size of the recovered image, which ideally should be as close as possible to the original secret [83]. Pixel expansion can cause many problems such as image distortion, more storage space, and higher complexity in generating shares.…”

Section: Visual Cryptography Metricsmentioning

confidence: 99%

An overview of visual cryptography techniques

Ibrahim

Teh

Abdullah

2021

Multimed Tools Appl

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Visual cryptography is an encryption technique that decomposes secret images into multiple shares. These shares are digitally or physically overlapped to recover the original image, negating the need for complex mathematical operations or additional hardware. There have been many variations of visual cryptography proposed over the years, each addressing different problems or to fulfill different security requirements. Existing review papers on the area only cover certain types of visual cryptography or lack comparisons between the various schemes. To address this gap, this paper provides broad overview of the area to aid new researchers in identifying research problems or to select suitable visual cryptography methods for their desired applications. For more veteran researchers in the area, our paper provides the most up-to-date coverage of the state-of-the-art. We first provide an introduction to the various categories of visual cryptography techniques, including a discussion on recently proposed schemes. These schemes are then compared in terms of their features, performance metrics, advantages and disadvantages. Compared to prior work, we extend the number of comparison metrics to include signal-to-noise ratio and the type of shares. Over 40 visual cryptography schemes that have been proposed in the past two decades were analyzed and compared. Our findings indicate that existing problems such as pixel expansion, poor quality of recovered image quality, computational and memory complexities still exist, and a optimizing the trade-off between these requirements still requires further investigation. We conclude the paper with a discussion of these open problems and future research directions.

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