ca/drm solution on ott

CA/DRM

The solution on OTT

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Ericsson Internal | 2012-12-11 |

Agenda

› CA/DRM in general› VCAS solution› Workflow


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Basic DRM components block diagramServer Side DRM System

VOD Repository

BroadcastContentServer

VOD Server

IPTV Network

Server Side Middleware

Off-line Encryption

Real-Time Encryption

IPTV Receiving Device

IPTVReceiving DeviceDRMComponent

Key Management

DRM system Management

Server

Scrambling Algorithm

Encrypted

De-Scrambling Algorithm

Scrambling Algorithm

Application Level Interfaces

DRM Interoperability Application Level Interfaces

Content Flow (Video/Audio Packets)

LEGENDS

DRM Black Box Components

IPTV Receiving DeviceSoftware


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DVB Content protection example

Four-level key hierarchy:

CW, AK (Authorization Key), DK (Distribution Key), and Secret Key (SK)

Solution:

HW based and SW based


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Operation of DVB Content protection› The content is scrambled by Control Words (CW), which are broadcasted to the

receivers via Entitlement Control Message (ECM)

› ECM are encoded using the Service Key that is associated with a service or program or channel and is valid for a period of time depending on the type of subscription => ECM contains short-lived Keys

› The information of the Service Key is included to Entitlement Management Message (EMM) => EMM contains long-lived Keys

› The EMM itself is encoded using Master Key shared with the service provider and security module available at the receiver

› The ECM and EMM are broadcasted along with the content to all the receivers. Each receiver filters its own messages and decrypts it using the information received by EMM and stored in the security module (i.e. smart-card)

› The contents of ECMs and EMMs are not standardized and as such they depend on the conditional access system being used


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VCAS solution

–VCAS for IPTV, securing managed networks, DVB-IP hybrid networks and receivers, IP Cable, further enhanced by secure Wholesale/Retail content distribution, and a Hospitality-optimized version. –VCAS for Internet TV, proving enhanced HTTP Live Streaming for

over-the-top (OTT) services. –VCAS for DVB, securing “one-way” broadcast networks. –Verimatrix MultiRights (multi-DRM support), currently Microsoft

PlayReady and Marlin DRMs. –VideoMark™ and StreamMark® user-specific forensic video

watermarking.


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VCAS for Internet TV Architecture


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Http streaming content protection


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HLS Scrambler Key request and generation

Encoder VCAS(OTT)

REST: Scramber File Request

Response with (Scrambler Key File)

Playlist with ETX-X-Key

Key generation


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Player Key request

Grant Access with Key

Deny Access

Viewright Web

Get Key URL from: #ETX-X-Key

HTTPS: Player Key Request with DeviceId

VCAS(OTT) VCAS(OMI)

getDeviceEntitlements(smsDeviceId, seesionHandle)

Return Entitlements

No EntitlementsIf no entitlements

Decrypt with the Key


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References

HLS protocol:http://tools.ietf.org/html/draft-pantos-http-live-streaming-10#page-23

Verimatrix internetTV:http://www.verimatrix.com/solutions/vcas-internet-tv

http://tools.ietf.org/html/draft-pantos-http-live-streaming-10#page-23

http://www.verimatrix.com/solutions/vcas-internet-tv

ca/drm solution on ott

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