计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2009年
31期
77-80,88
,共5页
可视密码%可视秘密共享方案%一般访问结构%阚值方案
可視密碼%可視祕密共享方案%一般訪問結構%闞值方案
가시밀마%가시비밀공향방안%일반방문결구%감치방안
visual cryptography%visual secret sharing scheme%general access structure%threshold scheme
目前提出的许多关于二值可视密码方案的论文都致力于研究在可视秘密共享方案里如何使像素扩展比较小或恢复图像的对比度比较高的问题.基于Shamir的秘密共享方案的思想,提出一种新的二值图像(k,n)-VCS可视密码方案.该方案利用二元域上线性方程组解的特征及多层(k,k)-VCS构造基础矩阵S~0,S~1,给出一个强的访问结构,从而获得(k,n)-VCS可视密码方案更小的像素扩展.
目前提齣的許多關于二值可視密碼方案的論文都緻力于研究在可視祕密共享方案裏如何使像素擴展比較小或恢複圖像的對比度比較高的問題.基于Shamir的祕密共享方案的思想,提齣一種新的二值圖像(k,n)-VCS可視密碼方案.該方案利用二元域上線性方程組解的特徵及多層(k,k)-VCS構造基礎矩陣S~0,S~1,給齣一箇彊的訪問結構,從而穫得(k,n)-VCS可視密碼方案更小的像素擴展.
목전제출적허다관우이치가시밀마방안적논문도치력우연구재가시비밀공향방안리여하사상소확전비교소혹회복도상적대비도비교고적문제.기우Shamir적비밀공향방안적사상,제출일충신적이치도상(k,n)-VCS가시밀마방안.해방안이용이원역상선성방정조해적특정급다층(k,k)-VCS구조기출구진S~0,S~1,급출일개강적방문결구,종이획득(k,n)-VCS가시밀마방안경소적상소확전.
Most recent papers about binary visual cryptography schemes are dedicated to study a higher contrast of recovered images or a smaller share size in visual secret sharing schemes.This paper proposes a new binary (k,n)-VCS based on the secret sharing schemes.A strong access structure is given which uses the feature of the solution of a system of linear equations over the binary field and hierarchical method for constructing basis binary matrices S~0,S~1,and the (k,n)-VCS is obtained and in almost all the case a much smaller pixel expansion is gained from this method.
