Page 460 - (ISC)² CISSP Certified Information Systems Security Professional Official Study Guide

variety of formats. ADEPT uses a combination of AES technology to
encrypt the media content and RSA encryption to protect the AES key.

Many e-book readers, with the notable exception of the Amazon
Kindle, use this technology to protect their content. Amazon’s Kindle
e-readers use a variety of formats for book distribution, and each
contains its own encryption technology.

Video Game DRM

Many video games implement DRM technology that depends on
consoles using an active internet connection to verify the game license

with a cloud-based service. These technologies, such as Ubisoft’s
Uplay, once typically required a constant internet connection to
facilitate gameplay. If a player lost connection, the game would cease
functioning.

In March 2010, the Uplay system came under a denial-of-service
attack and players of Uplay-enabled games around the world were
unable to play games that previously functioned properly because their

consoles were unable to access the Uplay servers. This led to public
outcry, and Ubisoft later removed the always-on requirement, shifting
to a DRM approach that only requires an initial activation of the game
on the console and then allows unrestricted use.

Document DRM

Although the most common uses of DRM technology protect
entertainment content, organizations may also use DRM to protect the
security of sensitive information stored in PDF files, office productivity

documents, and other formats. Commercial DRM products, such as
Vitrium and FileOpen, use encryption to protect source content and
then enable organizations to carefully control document rights.

Here are some of the common permissions restricted by document
DRM solutions:

Reading a file

Modifying the contents of a file

Removing watermarks from a file