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1. WO2020206167 - PROTECTED CLIENT INVENTORY REDEPLOYMENT

Publication Number WO/2020/206167
Publication Date 08.10.2020
International Application No. PCT/US2020/026452
International Filing Date 02.04.2020
IPC
G06F 21/62 2013.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
60Protecting data
62Protecting access to data via a platform, e.g. using keys or access control rules
H04L 29/06 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
29Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/-H04L27/136
02Communication control; Communication processing
06characterised by a protocol
G06F 21/10 2013.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
10Protecting distributed programs or content, e.g. vending or licensing of copyrighted material
CPC
H04N 21/2351
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
23Processing of content or additional data; Elementary server operations; Server middleware
235Processing of additional data, e.g. scrambling of additional data or processing content descriptors
2351involving encryption of additional data
H04N 21/25816
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
258Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
25808Management of client data
25816involving client authentication
H04N 21/26609
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
266Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
26606for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
26609using retrofitting techniques, e.g. by re-encrypting the control words used for pre-encryption
Applicants
  • ARRIS ENTERPRISES LLC [US]/[US]
Inventors
  • HAWTHORNE, Philip B.
Agents
  • COOPER, Victor G.
Priority Data
62/828,75403.04.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROTECTED CLIENT INVENTORY REDEPLOYMENT
(FR) REDÉPLOIEMENT D'INVENTAIRE DE CLIENT PROTÉGÉ
Abstract
(EN)
The systems and method disclosed herein address introduce identifiers within the individual entitlement management messages (EMMs) addressed to that client that uniquely identify the combination of system and subscriber account to which the client is deployed, and use of them to issue automatic 'factory reset' behavior when the client is re-authorized for the new subscriber. In one embodiment, the EMM messages used to trigger the reset behavior are cryptographically signed specifically for the individual client to ensure that such a message cannot be maliciously sent by an untrusted third party. The facility to deliver such a message is already available within the conditional access system (CAS).
(FR)
Les systèmes et le procédé décrits dans les présentes introduisent des identifiants dans les messages de gestion de droits individuels (EMM) adressés audit client qui identifient de manière unique la combinaison du système et du compte d'abonné auquel le client est déployé, et l'utilisation de ceux-ci pour émettre un comportement de « réinitialisation aux paramètres d'usine » lorsque le client est autorisé à nouveau pour le nouvel abonné. Dans un mode de réalisation, les messages EMM utilisés pour déclencher le comportement de réinitialisation sont signés de manière cryptographique spécifiquement pour le client individuel afin de garantir qu'un tel message ne peut pas être envoyé de manière malveillante par un tiers non sécurisé. L'installation pour délivrer un tel message est déjà disponible dans le système d'accès conditionnel (CAS).
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