%0 Journal Article
%T Comparaci¨®n entre Varios Esquemas de Criptograf¨ªa Visual Extendida
%A Espejel
%A Angelina
%A Nakano
%A Mariko
%A P¨¦rez
%A H¨¦ctor
%J Informaci¨®n tecnol¨®gica
%D 2012
%I Scientific Electronic Library Online
%R 10.4067/S0718-07642012000400013
%X a description and comparison of three visual extended cryptography algorithms is presented. currently these methods are often used as a basis for developing more complex schemes. results related to overlapping shades, pixel expansion, quality of images and shades, and the number of coded images are obtained. in conventional visual cryptography a secret image is encrypted into a set of images that look like random-noise and are distributed to each participant of the scheme. to obtain the secret image the images received must be super-imposed. .in the extended visual cryptography the shades are visually recognizable images. it is concluded that the three methods present particular advantages depending on the application.
%K visual cryptography
%K extended visual cryptography
%K secret sharing scheme.
%U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0718-07642012000400013&lng=en&nrm=iso&tlng=en