La specifica Interoperable DRM
Platform 2.1 e Chillout
Filippo Chiariglione (CEDEO.net)
1° incontro dmin.it
Torino, 2007/06/25
2007/06/25
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Il Digital Media Project
• Il DMP è un’associazione senza scopo di lucro
fondata a Ginevra a dicembre 2003 con l’obiettivo
– ...to promote continuing successful development,
deployment and use of Digital Media that respect the
rights of creators and rights holders to exploit their
works, the wish of end users to fully enjoy the benefits
of Digital Media and the interests of various value-chain
players to provide products and services…
• Raggiunge i suoi obiettivi attraverso standard per
– Data formats
– Protocols
• Gli standard DMP sono
– Interoperable DRM Platform (IDP), disponibile come v.
2.1 e, a luglio, v. 3.0
– Reference Implementation (Chillout) in Open Source
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Represent Content
Represent Identifier
Represent Metadata
DCI
Rappresentazione
del Contenuto
Represent Resource
Represent Identifier
Represent Metadata
Represent DRM Information
Represent DRM Tool
Un esempio di
categorie di
informazione la cui
rappresentazione è
specificata in IDP-2.1
Represent DRM Tool Body
Represent Device Information
Represent License
Represent Key Body
Represent Domain Resource
Represent Key
Represent Key Body
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Rappresentazione dell’informazione/1
•
•
•
•
•
•
•
•
•
•
•
•
Content
Metadata
DCI Signature
DCI Hash
Identifier
Resource
DRM Information
DRM Tool
DRM Tool Body
Rights Data
License
Key
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Rappresentazione dell’informazione/2
•
•
•
•
•
•
•
•
•
•
•
DRM Messages
Authentication Messages
Device Information
Domain
Domain Protocol
Use Data
Access Protocol
Device Identifier Protocol
Identify Content Protocol
Binary XML
Event Report
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Protocolli e Package
• Protocols
–
–
–
–
–
to
to
to
to
to
Identify Entities
Authenticate Entities
Manage Domain
Manage DRM Tools
Access
• Package Content
– As File (DMP Content Format – DCF)
– As Stream (DMP Content Stream – DCS)
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Dispositivi in una Catena del Valore
License
Provider
Device
5
2
Content
Identific.
Device
11
6
1
8
Content
Creation
Device
3
DRM Tool
Provider
Device
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Domain 13
Mgmt
Device
4
Content
Provider
Device
7
10
End-User
Device
(SAV)
End-User
Device
(SAV)
9
12
Non-DMP
device
Device
Identific.
Device
IDP-2.1 e Chillout
Domain
Identific.
Device
14
PAV
eXternal
Device
15
End-User
Device
(PAV)
7
Flessibilità di modelli di business
Service
Provider
Device
Content
Return Channel
Content
Identific.
Device
Content
Provider
Device
License
Identification
Identific.
Device
License
Provider
Device
DRM
License
Tool
Identification
Identific.
Device
DRM Tool
Provider
Device
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Return Channel
EndUser
Device
License
Return Channel
DRM Tool
Return Channel
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Le funzionalità di un Dominio
U
S
e
r
Domain
Management
Device
End-User
Device
Network
U
S
e
r
End-User
Device
End-User
Device
User
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Provider
Device
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S
e
r
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Le specifiche DMP
AKA “Approved Documents”
• Disponibili online alla seguente URL:
http://www.dmpf.org/project/ga14/idp-21.html
• 0981: Approved Document No. 1 – Technical Reference: ValueChain Functions and Requirements, Version 2.1
• 0982: Approved Document No. 2 – Technical Reference:
Architecture, Version 2.1
• 0983: Approved Document No. 3 – Technical Specification:
Interoperable DRM Platform, Version 2.1
• 0984: Approved Document No. 4 – Technical Specification: Use
Cases and Value Chains, Version 2.1
• 0985: Approved Document No. 5 – Technical Specification:
Certification and Registration Authorities, Version 2.1
• 0986: Approved Document No. 6 – Technical Reference:
Terminology, Version 2.1
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Chillout®
il software di riferimento del DMP
• Un insieme di librerie Java
• Organizzate come
– Core library: realizza le specifiche IDP
– Auxiliary library: incapsula alcune funzionalità
– Applications: un insieme di applicazioni (Dispositivi, …)
Applications
Core library
Auxiliary
library
Java platform
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The Chillout SVN
repository
The software can be checked
out using an SVN client and
compiled using Maven2.
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La Core Library
• La Core Library di Chillout è
costituita dalle seguenti classi:
– Represent
– Package
– Protocol
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The Represent Classes
• The Chillout Core library provides a set of
classes to easily generate any XML structure
defined in IDP, and conversely to extract any
information contained within.
• This is achieved by employing an Open
Source software tool called Java Architecture
for XML Binding (JAXB):
– Offline: to generate the classes to handle XML
– At runtime: to
• Un-marshal XML structures to Java objects (the
instances of the classes generated from the
schemas).
• Marshal Java objects into XML structures.
• Verify if the incoming xml document is valid or not
according to the schemas
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The Package classes
• The Core library provides a set of
functions to
– Bundle media resources with the DCI and
other information in a file named DCF
– Extract this information from a DCF
• The DMP Content Format is based on the
MPEG-21 File Format
• The Package classes allow any Java
application to access the information
contained in a DCF or to create a DCF
based on data in input
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The Protocols classes
• Devices in a media Value Chain require a
standard protocol to communicate
• The description of the various protocols is done in
WSDL
• The Core library provides a set of functionalities
to generate and parse the XML messages
exchanged between devices while performing a
Protocol
• The Open Source Axis tool is used to send and
receive such messages over the SOAP protocol
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What is the Auxiliary Library
• It comprises of those classes
encapsulating the functionalities of a
number of modules required for devices to
operate according to the IDP specification.
• Commercial applications may well decide
to implement those key DRM components
in a proprietary way, even in hardware.
• Chillout at this stage only provides a
reference implementation of them.
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Auxiliary Library Components
• The Security Manager:
– A module incorporating all those functionalities such as
securely storing digital certificates and licences, performing
operations involving Digital Signatures, etc...
• The DRM Processor:
– A SAV module in charge of instantiating and managing the
DRM Tools protecting a media resource
• DRM Tools:
– Modules performing DRM functions such as decryption, key
management, etc.
• License Authorisation:
– A module that has the following:
• Input: An REL License file and a Query file
• Output:
– Authorization result: (YES, NO (and why), MAYBE (and why))
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Applications overview
• Chillout provides a set of Devices that are easy to
configure and run
• This helps promoting adoption of Chillout and the
DMP specification by enabling those users
– Not experienced in the DRM field
– Not enough skilled in programming
– working for small companies
to experiment with a technology that so far could
only be used by those experts in the field
• The Applications category contains source and
executable Java code built on top of the Core
classes, and integrated with Auxiliary classes
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L’architettura Chillout
• Tutti i Dispositivi sono dotati della Core library (Open
Source o proprietaria, ma certificata, se richiesto dalla
Catena del Valore)
• I Dispositivi possono essere dotati di Auxiliary Library
per facilitare lo sviluppo di applicazioni
– Ma non è richiesta per l’interoperabilità
• Ogni Applicazione è costituita da codice che è
tipicamente specifico del Dispositivo e può benissimo
essere proprietario
• Chillout è attualmente in Java (su Win, Mac, Linux)
– La proposta non impone l’uso di questo ambiente per ottenere
interoperabilità
– La comunicazione tra dispositivi è attuata mediante protocolli
descritti in WSDL ed è del tutto agnostica all’ambiente
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Dispositivi già realizzati
•
•
•
•
•
•
•
•
Device Identification Device (DID)
Content Creation Device (CCD)
Content Identification Device (CID)
License Provider Device (LPD)
Content Provider Device (CPD)
DRM Tool Provider Device (TPD)
Content Consumption Device (SAV)
Domain Management Device (DMD)
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CCD (1): Welcome
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CCD (2): Control Panel
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CCD (3): Add Resource
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CCD (4) New Content Item
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CCD (5)
Resource
DRM
Settings
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CCD (6): DRM Tool Settings
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CCD (7): Publish the DCI
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CPD (1): Upload Content
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CPD (2): Browse for Content
!!! CPD online in CNR: http://150.145.55.118:8080/chillout_cpd-0.0.5 !!!
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SAV (1): View the DCI
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SAV (2): Play a Resource
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SAV (2): Play a Governed Resource
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SAV (2): Subscribe to a Domain
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Device online in CNR
• LPD (Access License):
– http://150.145.55.118:8080/chillout_lpd0.0.5/services/LPDProcessor
• DMD (Create Domain & Join Domain):
– http://150.145.55.118:8080/chillout_dmd0.0.5/services/DMDCreateDomainProcessor
– http://150.145.55.118:8080/chillout_dmd0.0.5/services/DMDAddDeviceProcessor
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Un esempio di catena del valore
License
Provider
Device
Content
Creation
Device
Domain Management
Device
Content
Provider
Device
End User Device
IPMP Tool
Provider
Device
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Grazie per l’attenzione!
[email protected]
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