Abstract
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.
| Translated title of the contribution | Comparison between various visual extended cryptography algorithms |
|---|---|
| Original language | Spanish |
| Pages (from-to) | 105-124 |
| Number of pages | 20 |
| Journal | Informacion Tecnologica |
| Volume | 23 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2012 |