Amazon Appstore DRM - How to implement?

I haven't been able to find out much from Amazon on how their DRM works or how to even implement it, nor can I find any documentation worth a damn on it at all.

Does Amazon alter the APK themselves or is this something the developer has to do?

Is there some decent doc (designed for developers) explaining it? Please p开发者_运维知识库ost link if you have it.

You don't have to do anything but check the DRM checkbox when uploading your appliaction.

From the FAQ:

Can I apply DRM to my app?

For each app that you submit to the Appstore, you can choose to apply DRM or make your app available without any rights management constraints. If you do choose to apply DRM to one of your apps, you must use the DRM system provided by Amazon through the Amazon Appstore Developer Portal.

Have you already joined the developer program and tried to access the portal?

Here are more details. I'm still trying to figure out if any of this has even happened yet, or if it's just being hyped up.