期刊名称：International Journal of Computer Science and Network
印刷版ISSN：2277-5420
出版年度：2012
卷号：1
期号：2
出版社：IJCSN publisher
摘要：A digital signature is an important public-key primitive thatperforms the function of conventional handwritten signatures forentity authentication, data integrity, and non-repudiation,especially within the electronic commerce environment.Currently, most conventional digital signature schemes are basedon mathematical hard problems. These mathematical algorithmsrequire computers to perform the heavy and complexcomputations to generate and verify the keys and signatures. In1995, Naor and Shamir proposed a visual cryptography (VC) forbinary images. VC has high security and requires simplecomputations. The purpose of this thesis is to provide analternative to the current digital signature technology. Weintroduce a new digital signature scheme based on the concept ofa non-expansion visual cryptography. A visual digital signaturescheme is a method to enable visual verification of theauthenticity of an image in an insecure environment without theneed to perform any complex computations. We proposedscheme generates visual shares and manipulates them using thesimple Boolean operations OR rather than generating andcomputing large and long random integer values as in theconventional digital signature schemes currently in use
