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White Paper V600
25 August 2005
of times or for a limited period of time. Rights can
also be defined so that the user is not able to for-
ward content to other devices.
Note: All supported image, audio and video for-
mats can be protected by DRM.
Packaging of rights and content
Rights and content can be packaged together and
delivered to the device as one DRM package. As
an alternative, content can be delivered to the
device first, followed by the rights later being
pushed to the device, for example via SMS. The
kind of service and business model adopted by the
content provider determines how the content and
rights should be packaged and delivered to the
device.
Protection properties
Content protection according to the OMA DRM
standard gets special properties. Content with for-
ward lock protection has the “Send to” option disa-
bled, which prevents it from further distribution.
Unless the content is encrypted, the user cannot
copy DRM content to other devices since the
“Send to” option is disabled for pictures, music
tones, etc. that are OMA DRM protected. Content
providers may choose to protect some content, but
leave some content unprotected.
Package and delivery
The OMA DRM standard defines two ways to pack-
age and deliver rights and content to a device:
combined or separated.
Combined delivery
Rights and content are packaged together into one
DRM Package and delivered to the device. In the
simplest case, no special rights are defined. The
content is just put into a DRM package, thus pro-
tected from being copied out from the device by
the user. This special case is called forward-lock.
It is useful for all types of content that the provider
wants to charge for.
Separate delivery
Rights are defined and sent in a push message.
The content is encrypted and made available for
users to download to their devices. The decryption
key is put into the rights file. Since the content is
encrypted, users cannot access it before the rights
have also arrived in the device. In this case, the
content can be freely distributed on the network,
only users with the rights file can access the con-
tent. Content providers can deliver the rights to the
user using push technology.
Downloading servers and
publishing servers
When using a mobile phone, the users do not have
to be aware of the network architecture. During a
content downloading session, typically many phys-
ical servers are involved. Sometimes transactions
may take place between different companies’ serv-
ers.
The actual content may be put on one server, the
downloading server. The content can be reached,
for example, through references from one or many
other servers, the publishing servers. The content
creator puts his or her content on the downloading
server through an interface to the content provider.
The user navigates to the publishing server and
selects the content, or rather a link to or description
of the content. The content is then downloaded
from the actual downloading server.
When content is downloaded to the device, opera-
tors generate revenues from the user via, for exam-
ple, their billing system. Operators might in their
turn be billed for rights by the content aggregator,
content provider or directly by the content creator.