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Enhanced halftone-based secure and improved visual cryptography scheme for colour/binary Images
Multimedia Tools and Applications ( IF 3.0 ) Pub Date : 2021-07-23 , DOI: 10.1007/s11042-021-11152-z
Saleha Ahmad 1 , Muhammad Faisal Hayat 1 , Shahzad Asef 1 , Yasir Saleem 1 , Muhammad Ali Qureshi 2
Affiliation  

Visual Cryptography (VC) is gaining attraction during the past few years to secure the visual information in the transmission network. It enables the visual data i.e. handwritten notes, photos, printed text, etc. to encrypt in such a way that their decryption can be done through the human visual framework. Hence, no computational assistance is required for the decryption of the secret images they can be seen through naked eye. In this paper, a novel enhanced halftoning-based VC scheme is proposed that works for both binary and color images. Fake share is generated by the combination of random black and white pixels. The proposed algorithm consists of 3 stages i.e., detection, encryption, and decryption. Halftoning, Encryption, (2, 2) visual cryptography and the novel idea of fake share, make it even more secure and improved. As a result, it facilitates the original restored image to the authentic user, however, the one who enters the wrong password gets the combination of fake share with any real share. Both colored and black images can be processed with minimal capacity using the proposed scheme.



中文翻译:

用于彩色/二进制图像的增强型基于半色调的安全和改进的视觉密码方案

视觉密码术 (VC) 在过去几年中越来越受到关注,以保护传输网络中的视觉信息。它使可视化数据(即手写笔记、照片、印刷文本等)能够以一种可以通过人类视觉框架进行解密的方式进行加密。因此,解密可以通过肉眼看到的秘密图像不需要计算辅助。在本文中,提出了一种适用于二进制和彩色图像的新型基于增强半色调的 VC 方案。假分享是由随机黑白像素组合产生的。所提出的算法由3个阶段组成,即检测、加密和解密。半色调、加密、(2, 2) 视觉密码学和假共享的新颖思想,使其更加安全和改进。因此,它有助于将原始恢复图像提供给真实用户,但是,输入错误密码的人会获得虚假共享与任何真实共享的组合。使用所提出的方案,可以以最小的容量处理彩色和黑色图像。

更新日期:2021-07-23
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