DRM (Digital Rights Management), also known as “digital lock”, is information technology, used by publishers and copyright holders to control what users can do with their intellectual property, no matter where the work is located.
There are different types of DRM, used by different content providers:
1. Amazon uses Amazon DRM on Kindle books.
2. Apple uses FairPlay DRM on e-books, music and video available on iTunes.
3. Some providers of Library e-books use Adobe DRM on EPUB and PDF e-books.
Number of simultaneous users;
Number of views;
Duration of access;
Type and number of devices, allowed to display the work;
Printing and copying capabilities;
Extent of content.
Adobe DRM is used by e-content providers ProQuest, EBSCO, OverDrive, etc.