content protection for television in the homedocbox.etsi.org/workshop/2009/200901_security... · pc...

Content Protection for Television in the home

Copyright © Digital Video Broadcasting Project DVB

Mark Jeffrey

MEntertainment & Devices Division

mark.jeffrey@microsoft.com

CPCM

DVB is the Digital Video Broadcasting Project

CPCM means:

Content

Protection &

Slide 2

Protection &

Copy

Management

ETSI TS 102 825-1 ... -14

Yes, CPCM does work!

Slide 3

CPCM demonstrated at IBC in September 2007

Role of CPCM

CPCM defines a set of technologies for protecting content after it has been acquired by the consumer

CPCM is not used in transmission to the home

CPCM is not tied to a specific service provider

Slide 4

CPCM is intended for use on commercial content only

Home videos etc. are neither protected nor blocked by CPCM

Role of CPCM

CPCM can acquire content from Free-to-air, Conditional Access (PayTV) or DRM systems

Once under CPCM, the content is controlled by the CPCM devices within agreed constraints

CPCM can be implemented in any type of device

Slide 5

CPCM can be implemented in any type of device

CPCM is complementary to other content protection mechanisms, and can be used in parallel with them

Slide 6

USE CASES FOR CPCM

CPCM in the Home

Tuner

Traditional TV

Tuner in Television, or in PayTV box

Simple wire connection

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connection(e.g. SCART, DVI)

CPCM in the Home

Tuner PVR

TV with PVR

Tuner in PVR or in Zapper box

Simple wire connections

Slide 8

connections

CPCM in the Home

Tuner PVR

Home Network

Tuner device connected by Ethernet or Wireless LAN

TCP/IP based

Slide 9

Home Network

TCP/IP based connections

Local Link Protection(e.g. WMDRM-ND)

“Authorised Domain” of devices (e.g. CPCM)

CPCM in the Home

Tuner Server

Remote Access TV

Tuner in home, or specialist server, allows remote access from other locations

Slide 10

InternetHome Network

Slide 11

HOW CPCM WORKS

How CPCM Works

Establishes Trust between devices

If required, establishes an Authorised Domain between multiple devices

Establishes secure communications

Encrypts the content using a secret keyNOT required for some Free-to-air content

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Puts Rights information and key into Content License

Securely delivers Content License with protected content

Decrypts content using Key, and allows use according to Rights

Free-to-air content

Establishing Trust

Authority

Manufacturer

Authority

RootCompliance and Robustness Regime (C&R)

Compliance and Robustness Regime (C&R)

Slide 13

Manufacturer Manufacturer Manufacturer

Device DeviceChallengeResponse

SAC Session

Division

Product

Slide 14

HOW CONTENT MOVES UNDER CPCM CONTROL

Basic Content Exchange Process

Device Device

SAC Session

ChallengeResponse

TV TVContentLicense

ContentLicense

Slide 15

TV TV

Scrambler Descrambler

Basic Content Storage Process

Device Device

SAC SACTV

ContentLicense

TVContentLicense

Slide 16

Scrambler Descrambler

TV TV TV

Slide 17

BUILDING AN AUTHORISED DOMAIN

Authorised Domain

TunerADAD

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Home Network

Authorised Domain

TunerADADAD AD AD

Slide 19

Home Network

AD

Authorised Domain

TunerADAD AD

PVRAD

Slide 20

Home Network

ADAD

AD

DVD-RWAD

Slide 21

CPCM AND OTHER CONTENT PROTECTION SYSTEMS

Examples of CPCM Content Acquisition

FTA Signal

CPCM

DVB-TZapper box

Cable CA

CPCM

DVB-CPayTV box

Sat. CA

CPCM

DVB-SPayTV box

DRM

CPCM

IPTV &Internet

Slide 22

CPCM CPCM CPCM CPCM

CPCM

PVR

CPCM

Display

Examples of CPCM Content Acquisition

FTA Signal

CPCM

DVB-TZapper box

Cable CA

CPCM

DVB-CPayTV box

Sat. CA

CPCM

DVB-SPayTV box

DRM

CPCM

IPTV &Internet

Slide 23

CPCM CPCM CPCM CPCM

CPCM

PVR

CPCM

Display

Examples of CPCM Content Consumption & Export

CPCM

PVR

CPCM

Display

Slide 24

Examples of CPCM Content Consumption & Export

CPCM

PVR

CPCM

Display

HDCPHDCP

Slide 25

Examples of CPCM Content Consumption & Export

CPCM

PVR

CPCM

Display

HDCPHDCP

DRMCPCM DRM

Slide 26

Media DevicePC

CIv2

Future Television

CPCM

Future CI Adapter

CIv2

Slide 27

CPCM AS A FRAMEWORK

CPCM as a Framework

The DVB CPCM specification provides a toolkit, with which various devices and services can be built

It defines those elements that are necessary for devices to securely transfer content and maintain rights

CPCM does not define how they are implemented

Manufacturers decide:

Slide 28

Manufacturers decide:

Which CPCM functions are necessary in each of their products

How to present CPCM information in their User Interface

CPCM as a Framework

There are many areas where hooks have been left for future additions, and for adaptation to specific business needs

Manufacturers and service providers adopting CPCM have the opportunity to experiment with many new content management scenarios

Slide 29

content management scenarios

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CONCLUSION

Conclusion

CPCM is a fairly straightforward specification

CPCM supports many current and future usage scenarios

CPCM will allow consumers to do more with their content

Home Networking

Remote Access

Portable Devices

Slide 31

Portable Devices

Removable Media

CPCM is complementary to other Content Protection mechanisms such as Conditional Access and Digital Rights Management

CPCM is flexible for the future needs of Consumers, Broadcasters and Content/Service Providers

Recognition

Recognise special contribution to CPCM by the following individuals:

Chris Hibbert (Disney)

Giles Godart-Brown (BSkyB)

Paul Szucs (Sony)

Slide 32

Paul Szucs (Sony)

Alain Durand (Thomson)

Jim Williams (MPAA)

Spencer Stephens (Warner Bros)

Thanks for your attention

Copyright © Digital Video Broadcasting Project DVB

M