Red Zion E-book is an application that is classified as a document viewing tool, and this software is embedded with compatibility support for widely used versions of Microsoft Windows. The Red Zion E-book program is integrated with a set of features that can open, display the content and access certain functionalities implemented into an RZB file, which is a digital document format used by some Slovenian ebook authors. Some of these RZB digital books are encrypted with copy protection keys, and these security tokens are stored in files in the RZK format. This means when a user wants to copy the content of an RZB file that is displayed in the main window of the Red Zion E-book's Graphical User Interface (GUI), this software initially checks if there is a security token that encrypts the content of the RZB file. If this program finds a security token, it requests for the correct set of keys from the user. When the user supplies the correct security keys, this software allows the user to copy the content of the RZB file. It will however deny copy access if the user provides an incorrect security key or if the user does not give one. Red Zion E-book is also known as Red Zion E-knjiga.