Reminder - Digital Publishing Suite (DPS) will End of Life on August 31st, 2019. 
Learn about the security features built-in to DPS, and the various security options available to you. 

DPS Security White Paper
Adobe (May 23, 2014)
This white paper describes the proactive approach and procedures implemented by Adobe to increase the security of your Adobe Digital Publishing Suite experience and your data included in applications built with Digital Publishing Suite.
Secure Content use cases for DPS
James Lockman (Apr 08, 2014)
Learn about various use cases for Secure Content, understand the changes to the authoring and reading experiences, and how Secure Content differs from DRM.
Secure Content
(Mar 15, 2014)
Video overview of new features to encrypt folio content for increased security throughout the DPS content experience.
Protecting content on an iOS device with DPS
James Lockman (Aug 16, 2013)
Learn how to use Apple's On-Disk Encryption to protect DPS apps and their associated content.