Resumen

NAKANO, Mariko; ESCAMILLA, Enrique; PEREZ, Héctor  y  IWAMOTO, Mitsugu. Threshold Based Visual Cryptography: A Tutorial Review. Inf. tecnol. [online]. 2011, vol.22, n.5, pp. 107-120. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642011000500013.

In this paper, a review for threshold-based visual cryptography (VC), a visual representation of the secret sharing scheme is presented. The VC has potential applications in the electronic banking system, as well as in personal identification systems. En la VC a binary image such as letters, logotypes or halftone images are shared among a group of participants using a set of images, so called shares. Until now several VC schemes, such as threshold-based VC, the general access VC and the extended VC, have been proposed. The conditions that must be satisfied for a correct recovery of the secret message, as well as the most relevant security issues of this scheme are also analyzed.

Palabras llave : visual cryptography; secret sharing scheme; threshold based scheme.