While crawling through FAXS 3.0 overview document, you will discover a fresh and interesting use case on page 12 :
UltraViolet is a digital rights authentication and cloud-based distribution system that can enable consumers of digital home entertainment content to stream and download purchased content through multiple platforms and devices. UltraViolet content will be downloaded (or streamed) in a Common File Format, (CFF) using Common Encryption (CENC).
READ THE OVERVIEW HERE : http://help.adobe.com/en_US/flashaccess/3.0/FAXS_3_0_Overview.pdf