multi-pixel encryption visual cryptography

ISCAS OpenIR

	multi-pixel encryption visual cryptography
	Guo Teng; Liu Feng; Wu Chuankun
	2012
会议名称	7th China International Conference on Information Security and Cryptography, Inscrypt 2011
会议录名称	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
页码	86-92
会议日期	November 30, 2011 - December 3, 2011
会议地点	Beijing, China
收录类别	EI
ISSN	0302-9743
ISBN	9783642347030
部门归属	(1) State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing 100190 China; (2) Graduate University of Chinese Academy of Sciences Beijing 100190 China
摘要	A visual cryptography scheme (VCS) is a secret sharing method, for which the secret can be decoded by human eyes without needing any cryptography knowledge nor any computation. In their pioneer work, Naor and Shamir mentioned that encrypting a block of pixels simultaneously may result in better result. Inspired by that idea, we first define multi-pixel encryption visual cryptography scheme (ME-VCS), which encrypts a block of t (1∈&le∈t) pixels at a time. Then we give an upper bound of the overall contrast of ME-VCS. We also give a lower bound of the pixel expansion of (n,n,t)-ME-VCS. At last, we built a contrast-optimal ME-VCS from a contrast-optimal VCS and built an optimal (n,n,t)-ME-VCS from an optimal (n,n)-VCS. © 2012 Springer-Verlag Berlin\idelberg.; A visual cryptography scheme (VCS) is a secret sharing method, for which the secret can be decoded by human eyes without needing any cryptography knowledge nor any computation. In their pioneer work, Naor and Shamir mentioned that encrypting a block of pixels simultaneously may result in better result. Inspired by that idea, we first define multi-pixel encryption visual cryptography scheme (ME-VCS), which encrypts a block of t (1∈&le∈t) pixels at a time. Then we give an upper bound of the overall contrast of ME-VCS. We also give a lower bound of the pixel expansion of (n,n,t)-ME-VCS. At last, we built a contrast-optimal ME-VCS from a contrast-optimal VCS and built an optimal (n,n,t)-ME-VCS from an optimal (n,n)-VCS. © 2012 Springer-Verlag Berlin\idelberg.
关键词	Cryptography Optimization Security Of Data
语种	英语
内容类型	会议论文
URI标识	http://ir.iscas.ac.cn/handle/311060/15895
专题	中国科学院软件研究所
推荐引用方式 GB/T 7714	Guo Teng,Liu Feng,Wu Chuankun. multi-pixel encryption visual cryptography[C],2012:86-92.