Rob, from his viewpoint south in Spain, explains DRM - Digital Rights Management in detail in a series of posts.
Not only are they right on the point, true to Robs style, but they are also interesting and brings forward information about the challenges for both end-users, clients, the provider / owner and the industry as a whole.
I suggest you read them. I found them really helpful myself.
Here goes:
Here Rob explains DRM, the pros and cons.
Humble Pie 2 - Datacentric security
This post explains datacentric security in detail, and its relevance to DRM.
Humble Pie 3 - Data classification
And in the last pie he ties it all with classification of data.



Enjoy the beach!
Thanks!