Audiovox SMT5600 - Smartphone - AT&T User Manual download pdf (Page 76)

Smartphone User Manual

Using your

camera

Smartphone User Manual

Using your

camera

How Album handles DRM

DRM is Digital Rights Management, a method of control-

ling the usage of protected media objects after they have

been downloaded. Some digital media les, such as songs

downloaded from online stores, are encrypted to prevent the

les from being unlawfully distributed or shared. Content

providers use the DRM technology to encrypt these les

when applicable. During the encryption process, the content

provider creates a license which species how and when

the le can be used.

For example, a content provider could create a license that

allows you to play a certain le on your computer, but not on

your Smartphone. Or, a license that allows you to play a cer-

tain le on your Smartphone, but perhaps only for a month,

or perhaps only a certain number of times. Files that have

licenses associated with them are called protected les.

Currently, there are three main methods (listed below)

for delivering DRM-encrypted content and any applicable

associated rights. The DRM-enabled content le and the

“rights object” are separate components. The rights object

is the encryption key, and also includes the instructions on

how the content can be used.

Forward Lock — This type of le is not encrypted, but

instead there is a ag associated with it that does not allow

you the option to send/forward it from your Smartphone.

There can only be one instance of the le.

Combined Delivery — The le is DRM-encrypted and is

delivered to your Smartphone together with its rights object.

In this case, the right is typically a preview or some other

limited execution.

Separate Delivery — The encrypted DRM le is downloaded

to your Smartphone alone, and the rights object is delivered

separately through some other secure channel such as WAP

Push, a special form of SMS with binary content in it.

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Audiovox SMT5600 - Smartphone - AT&T User Manual Page 76