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Region Incrementing visual cryptography Scheme with Same Contrast

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Chinese Journal of Electronics 2016年第4期25卷 621-624页

作者： LI Shundong LI Jiliang WANG Daoshun School of Computer Science Shaanxi Normal University Department of Computer Science and Technology Tsinghua University

In binary Region incrementing visual cryptography schemes(RIVCSs),the secrets of multiple secrecy regions can be gradually revealed by human visual system.A characteristic of the existing binary RIVCSs different from traditional binary visual cryptography schemes(VCSs) is that,the contrasts for different revealed regions are different while traditional binary VCSs have same *** keep the quality(contrast) of recovered image compatible with the traditional VCS,we use integer linear programming to design a binary(k,n)-RIVCS with same contrast for all secrecy regions in this *** results demonstrate that our method is feasible and *** trade-off is that our scheme involves a larger pixel expansion.

关键词： Region incrementing visual cryptography Linear programming visual secret sharing

Multi secret image color visual cryptography schemes for general access structures

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Progress in Natural Science:Materials International 2006年第4期16卷 431-436页

作者： YI Feng, WANG Daoshun , LUO Ping, HUANG Liansheng and DAI Yiqi Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China Department of Computer Science and Technology Tsinghua University Beijing 100084 China

In the proposed visual cryptography schemes for general access structures, the single secret image black-and-white visual cryptography schemes with meaningful shares have been constructed, in which the shares are innocent looking images. The meaningful shares have not been realized in single secret image color schemes; neither have the multi secret images color schemes. In this paper, the multi secret images color visual cryptography schemes for general access structures with meaningful shares are constructed by the method of matrix concatenation, the pixel expansion is obtained, and the validity of the scheme is proven. In our scheme, the different combination of meaningful color shares can be used to recover distinct color secret images. The multi secret images black-and-white visual cryptography scheme is a special case of our color scheme.

关键词： visual cryptography secret sharing scheme general access structure.

Secret Image Communication Scheme Based on visual cryptography and Tetrolet Tiling Patterns

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Computers, Materials & Continua 2020年第11期65卷 1283-1301页

作者： N.RajeshKumar DYuvaraj G.Manikandan R.BalaKrishnan B.Karthikeyan D.Narasimhanand N.R.Raajan Srinivasa Ramanujan Centre SASTRA Deemed UniversityKumbakonamTamil NaduIndia Department of Computer Science Cihan University-DuhokDuhokIraq School of Computing SASTRA Deemed UniversityThanjavurTamil NaduIndia School of EEE SASTRA Deemed UniversityThanjavurTamil NaduIndia

visual cryptographic scheme is specially designed for secret image sharing in the form of shadow *** basic idea of visual cryptography is to construct two or more secret shares from the original image in the form of chaotic *** this paper,a novel secret image communication scheme based on visual cryptography and Tetrolet tiling patterns is *** proposed image communication scheme will break the secret image into more shadow images based on the Tetrolet tiling *** secret image is divided into 4×4 blocks of tetrominoes and employs the concept of visual cryptography to hide the secret *** main feature of the proposed scheme is the selection of random blocks to apply the tetrolet tilling patterns from the fundamental tetrolet pattern *** procedure is used to perform both tetrolet transform and the scheme of visual ***,the experimental results showcase the proposed scheme is an extraordinary approach to transfer the secret image and reconstruct the secret image with high visual quality in the receiver end.

关键词： Tetrominoes tile visual secret share image transmission security visual cryptography

RGB Based Multiple Share Creation in visual cryptography with Aid of Elliptic Curve cryptography

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China Communications 2017年第2期14卷 118-130页

作者： K.Shankar P.Eswaran Department of Computer Science and Engineering Alagappa UniversityKaraikudi-630003Tamil NaduIndia Department of Computer Science and Engineering Alagappa UniversityKaraikudi-630003Tamil NaduIndia

In visual cryptography, many shares are generated which are illogical containing certain message within themselves. When all shares are piled jointly, they tend to expose the secret of the image. The notion of visual secret sharing scheme is to encrypt a secret image into n illogical share images. It is unable to reveal any data on the original image if at least one of the shares is not achieved. The original image, in fact, is realized by overlapping the entire shares directly, in order that the human visual system is competent to identify the collective secret image without employing any complicated computational tools. Therefore, they are communicated steadily as number of shares. The elliptic curve cryptography approach, in turn, is employed to augment the privacy and safety of the image. The *** technique is utilized to generate the multiple shares which are subjected to encryption and decryption by means of the elliptic curve cryptography technique. The test outcomes have revealed the fact that the peak signal to noise ratio is 58.0025, Mean square error value is 0.1164 and the correlation coefficient is 1 for the decrypted image without any sort of distortion of the original image.

关键词： visual cryptography pixel shares elliptic curve cryptography encryption PSNR mean square error

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Securing Technique Using Pattern-Based LSB Audio Steganography and Intensity-Based visual cryptography

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Computers, Materials & Continua 2021年第4期67卷 1207-1224页

作者： Pranati Rakshit Sreeparna Ganguly Souvik Pal Ayman AAly Dac-Nhuong Le JIS College of Engineering KalyaniWest Bengal741235India Global Institute of Management and Technology NadiaWest Bengal741102India Department of Mechanical Engineering College of EngineeringTaif UniversityTaif21944Saudi Arabia Institute of Research and Development Duy Tan UniversityDanang550000Vietnam Faculty of Information Technology Duy Tan UniversityDanang550000Vietnam

With the increasing need of sensitive or secret data transmission through public network,security demands using cryptography and steganography are becoming a thirsty research area of last few *** two techniques can be merged and provide better security which is nowadays extremely *** proposed system provides a novel method of information security using the techniques of audio steganography combined with visual *** this system,we take a secret image and divide it into several subparts to make more than one incomprehensible sub-images using the method of visual *** of the sub-images is then hidden within individual cover audio files using audio steganographic *** cover audios are then sent to the required destinations where reverse steganography schemes are applied to them to get the incomprehensible component images *** last,all the sub-images are superimposed to get the actual secret *** method is very secure as it uses a two-step security mechanism to maintain *** possibility of interception is less in this technique because one must have each piece of correct sub-image to regenerate the actual secret *** superimposing every one of the sub-images meaningful secret images cannot be *** files are composed of densely packed *** high density of data in audio makes it hard for a listener to detect the manipulation due to the proposed time-domain audio steganographic method.

关键词： Information security visual cryptography audio steganography secret image reverse steganography

Preventing Phishing Attack on Voting System Using visual cryptography

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Journal of Computer and Communications 2022年第10期10卷 149-161页

作者： Ahood Alotaibi Lama Alhubaidi Alghala Alyami Leena Marghalani Bashayer Alharbi Naya Nagy College of Cybersecurity and Digital Forensics Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia College of Computer Science and Information Technology Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia

Phishing is one of the most common social engineering attacks that users over the internet fall for. An example is voting systems, and because such systems should be accurate and error free, phishing prevention techniques are crucial. visual cryptography (VC) is utilized for efficient voting system authentication to cast votes. VC is one of the most secure approaches for privacy protection as it ensures the confidentiality of the voting system. This paper discusses proposed phishing prevention methods and compares different proposed methods.

关键词： Remote Voting System (RVS) Voting System (VS) Shares Ballots Authentication visual cryptography Phishing Captcha

Web Application Authentication Using visual cryptography and Cued Clicked Point Recall-based Graphical Password

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Journal of Computer Science Research 2021年第3期3卷 29-41页

作者： Mary Ogbuka Kenneth Stephen Michael Olujuwon Department of Computer Science Federal University of TechnologyMinnaNigeria Department of Cyber Security Science Federal University of TechnologyMinnaNigeria

Alphanumerical usernames and passwords are the most used computer authentication *** approach has been found to have a number of ***,for example,frequently choose passwords that are simple to *** the other side,if a password is difficult to guess,it is also difficult to *** passwords have been proposed in the literature as a potential alternative to alphanumerical passwords,based on the fact that people remember pictures better than *** graphical passwords,on the other hand,are vulnerable to a shoulder surfing *** address this shoulder surfing vulnerability,this study proposes an authentication system for web-applications based on visual cryptography and cued click point recall-based graphical *** efficiency of the proposed system was validated using unit,system and usability testing *** results of the system and unit testing showed that the proposed system accomplished its objectives and *** results of the usability test showed that the proposed system is easy to use,friendly and highly secured.

关键词： Password authentication Graphical password Text password visual cryptography Shoulder surfing Key-logging

Construction of General (k, n) Probabilistic visual cryptography Scheme

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Journal of Electronic Science and Technology 2011年第4期9卷 317-324页

作者： Ching-Nung Yang Chih-Cheng Wu Feng Liu with the Department of Computer Science and Information Engineering National Dong Hwa University with State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences.

visual cryptography scheme （VCS） is a secure method that encrypts a secret image by subdividing it into shadow images. Due to the nature of encryption VCS is categorized into two types： the deterministic VCS （DVCS） and the probabilistie VCS （PVCS）. For the DVCS, we use m （known as the pixel expansion） subpixels to represent a secret pixel. The PVCS uses only one subpixel to represent a secret pixel, while the quality of reconstructed image is degraded. A well-known construction of （k, n）-PVCS is obtained from the （k, n）-DVCS. In this paper, we show another construction of （k, n）-PVCS by extending the （k, k）-PVCS.

关键词： Probabilistic visual cryptography visual cryptography visual secret sharing.

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Shift visual cryptography scheme of two secret images

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Progress in Natural Science:Materials International 2003年第6期 59-65页

作者： WANG Daoshun , LUO Ping, YANG Lu, QI Dongxu and DAI Yiqi (1. Department of Computer Science and Technology, Tsmghua University, Beijing 100084, China 2. Chengdu Institute of Computer Applications, Chinese Academy of Sciences, Chengdu 610041, China 3. School of Information Science and Technology, Zhongshan U-niversity, Guangzhou 510275, China)

A new visual cryptography scheme of two secret images, which is named the shift visual cryptography of two secret images, is given. The compound function family of a general construction model is also introduced. The uniqueness and validity of this model are proved, and the minimum rows and columns for realizing the scheme are obtained. Compared with visual cryptography of one secret image, the shift visual cryptography scheme can share two secret images with the same size of pixels expansion without losing the contrast. It has randomness and various forms, and furthermore, we can also visually recover two secret images even if the two shares are different in form and color.

关键词： visual cryptography compound function family minimum threshold scheme.