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+++ b/Symbian3/PDK/Source/GUID-249E8EE2-5334-4CA2-93AB-4010E6404D11.dita	Fri Jan 22 18:26:19 2010 +0000
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+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
+<!-- This component and the accompanying materials are made available under the terms of the License 
+"Eclipse Public License v1.0" which accompanies this distribution, 
+and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
+<!-- Initial Contributors:
+    Nokia Corporation - initial contribution.
+Contributors: 
+-->
+<!DOCTYPE concept
+  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
+<concept id="GUID-249E8EE2-5334-4CA2-93AB-4010E6404D11" xml:lang="en"><title>OMA
+DRM v2.0</title><shortdesc>The OMA Digital Rights Management (DRM) v2.0 specification provides
+stronger content protection and improved functionality for rich media content,
+such as music and video. The specification enables an end-to-end DRM system
+that takes into account the need for secure distribution, authentication of
+devices, revocation and other aspects. The Symbian platform supports the mandatory
+features of the OMA DRM v2.0 specification.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>The improved security, compared with OMA DRM v1.0, is achieved by using:</p>
+<ul>
+<li><p>Bilateral authentication between the rights issuers and devices</p></li>
+<li><p>Public key infrastructure (PKI) certificates and online revocation
+checks</p></li>
+<li><p>Protection of the confidentiality and integrity of the rights objects</p></li>
+</ul>
+<p>Improved functionality and usability are achieved, for example, by providing
+enhanced preview functions and mechanisms for sharing content within a registered
+community of devices, called a domain. </p>
+<p>The OMA DRM v2.0 specification as such is not mobile-specific, which means
+that there can be OMA DRM v2.0 non-mobile devices, such as PC software, thus
+enabling better interaction and content transferability between devices.</p>
+<p>In the Symbian platform, OMA DRM v2.0 is enabled for music
+and video files via HTTP or OMA download. For more information on the OMA
+DRM v2.0 features that are supported in the Symbian platform, see <xref href="GUID-EAF3FCBE-A68C-4881-A461-774D481DD315.dita">Supported
+OMA DRM v2.0 features</xref>.
+For more information on supported OMA DRM v2.1 features, see <xref href="GUID-09A4172E-DB54-4ADF-A718-8100154A6031.dita">OMA DRM
+v2.1</xref>.</p>
+<section id="GUID-4D792C94-43D5-44CD-BE3E-677819F4436F"><title>Silent rights
+object acquisition</title><p>Silent rights object acquisition means that no
+DRM-specific notifications are shown during the acquisition if the feature
+is enabled in the media file. The OMA DRM specification defines two types
+of silent rights URL:</p><ul>
+<li><p>On-demand</p><p>Rights object is acquired when the user tries to open
+the file.</p></li>
+<li><p>In-advanced</p><p>Rights object is acquired at the earliest possible
+time.</p></li>
+</ul><p>The Symbian platform supports only on-demand silent rights acquisition.
+The in-advanced type is treated similarly as on-demand. </p></section>
+<section id="GUID-D3DD4B99-351F-43FF-B911-5DF87FEF09AA"><title>Transaction
+tracking</title><p>Transaction tracking allows the <xref href="GUID-788FCBFA-B4FB-4001-B838-4B59995E2E33.dita">rights
+issuer</xref> to track the content flow from one user to another via superdistribution.
+The rights issuer includes a <codeph>TransactionID</codeph> in the rights
+object, which allows the rights issuer to build a reward mechanism, for example.</p></section>
+<section id="GUID-CBBDB66E-7D4E-4931-A886-524D17529AAD"><title>PKI requirements</title><p>In
+the PKI, secret data is encrypted with the recipient's public key. Only the
+recipient can open the content with the private key. This private key system
+is sometimes known as symmetric cryptography and the public key system as
+asymmetric cryptography. PKI makes sure that both the mobile device and server
+are authenticated. The key in the mobile device identifies the mobile device
+and the key in the server identifies the server. The device key is stored
+by using data caging. If the key is lost, the downloading rights are revoked,
+but usage rights still apply.</p><p>In addition to the software implementation
+in the Symbian platform, each device must have the keys and certificates listed
+below:</p><ul>
+<li><p>Device private key</p></li>
+<li><p>Public certificates</p></li>
+<li><p>Device certification authority (CA) certificate</p></li>
+<li><p>CA root certificate</p></li>
+</ul><note><p>The Symbian platform does not provide PKI keys, certificates,
+or server infrastructure. <xref href="http://www.cm-la.com" scope="external">Content
+Management License Administrator</xref> is a known PKI provider for OMA DRM
+v2.0. The DRM implementation in the Symbian platform is prepared for CMLA,
+but it is not certified, because only devices can be certified by CMLA.</p></note></section>
+</conbody></concept>
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