Results 21 to 30 of about 30,954 (223)
An optimization of color halftone visual cryptography scheme based on Bat algorithm
Journal of Intelligent Systems, 2021 Visual cryptography is a cryptographic technique that allows visual information to be encrypted so that the human optical system can perform the decryption without any cryptographic computation. The halftone visual cryptography scheme (HVCS) is a type of
Aswad Firas Mohammed +2 more
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Visual cryptography on graphs [PDF]
Journal of Combinatorial Optimization, 2008 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lu, Steve +2 more
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Visual Cryptography Scheme with Essential Participants
Mathematics, 2020 Visual cryptography scheme (VCS) shares a binary secret image into multiple shadows printed on transparencies. Stacking shadows can visually decode the secret image without computational resources. Specifically, a (k, n) threshold VCS ((k, n)-VCS) shares
Peng Li, Liping Yin, Jianfeng Ma
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Verifiable Visual Cryptography [PDF]
2012 Sixth International Conference on Genetic and Evolutionary Computing, 2012 The paper presents a verifiable visual cryptography (VC) scheme for checking the validness to the shares engaged in a VC decoding instance. the idea is to stamp a continuous pattern on the shares belonging to the same secret image, and a part of the pattern can be revealed through aligning and stacking half of two shares together.
Shuo-Fang Hsu +4 more
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Hyperchaotic technology-based efficient image encryption algorithm an overview. [PDF]
مجلة جامعة الانبار للعلوم الصرفة, 2023 Multimedia data encryption is so crucial because the multimedia encryption algorithm needs more time and memory, and it is difficult to implement. Because of this, the hyperchaotic image encryption technique is becoming more and more popular, which uses ...
Kawthar Khalaf, Ali Sagheer
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Cheating Prevention in Visual Cryptography [PDF]
IEEE Transactions on Image Processing, 2007 Visual cryptography (VC) is a method of encrypting a secret image into shares such that stacking a sufficient number of shares reveals the secret image. Shares are usually presented in transparencies. Each participant holds a transparency. Most of the previous research work on VC focuses on improving two parameters: pixel expansion and contrast.
Chih-Ming, Hu, Wen-Guey, Tzeng
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Ensuring patients privacy in a cryptographic-based-electronic health records using bio-cryptography [PDF]
, 2017 Several recent works have proposed and implemented cryptography as a means to preserve privacy and security of patients health data. Nevertheless, the weakest point of electronic health record (EHR) systems that relied on these cryptographic schemes is ...
Emuoyibofarhe, Justice +2 more
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Personalized Shares in Visual Cryptography
Journal of Imaging, 2018 This article deals with visual cryptography. It consists of hiding a message in two key images (also called shares). The decryption of the message is obtained through human vision by superposition of the shares.
Karim Hammoudi, Mahmoud Melkemi
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On the Design of Perceptual MPEG-Video Encryption Algorithms [PDF]
, 2006 In this paper, some existing perceptual encryption algorithms of MPEG videos are reviewed and some problems, especially security defects of two recently proposed MPEG-video perceptual encryption schemes, are pointed out.
Bhargava, Bharat +4 more
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An Enhanced Approach of Image Steganographic Using Discrete Shearlet Transform and Secret Sharing
مجلة بغداد للعلوم, 2022 Recently, the internet has made the users able to transmit the digital media in the easiest manner. In spite of this facility of the internet, this may lead to several threats that are concerned with confidentiality of transferred media contents such as ...
Yasir Ahmed Hamza +2 more
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