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White Paper
Z500a
21 June 2004
Package and delivery
The OMA DRM standard defines two ways to package
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 protected 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 put into a file of their own. 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 to the
device. In this case, the content can be freely distributed
on the network, only users with the rights file can access
the content. 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 physical servers are
involved. Sometimes transactions may take place
between different companies’ servers.
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, operators
generate revenues from the user via, for example, their
billing system. Operators might in their turn be billed for
rights by the content aggregator, content provider or
directly by the content creator.