Invention Grant
US07647641B2 Method and system for conditional access applied to protection of content
有权
用于条件访问的方法和系统用于保护内容
- Patent Title: Method and system for conditional access applied to protection of content
- Patent Title (中): 用于条件访问的方法和系统用于保护内容
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Application No.: US10584511Application Date: 2003-12-23
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Publication No.: US07647641B2Publication Date: 2010-01-12
- Inventor: Gilles Dubroeucq , Jean-Pierre Vigarie
- Applicant: Gilles Dubroeucq , Jean-Pierre Vigarie
- Applicant Address: FR Paris la Defense Cedex
- Assignee: Viacess
- Current Assignee: Viacess
- Current Assignee Address: FR Paris la Defense Cedex
- Agency: Nixon Peabody LLP
- International Application: PCT/FR03/50207 WO 20031223
- International Announcement: WO2005/071963 WO 20050804
- Main IPC: H04N7/16
- IPC: H04N7/16 ; H04N7/167 ; H04L9/00 ; H04L29/06
Abstract:
The invention relates to an access control method controlling access to a broadcast digital dataflow previously scrambled.The method according to the invention includes the following steps: On transmission: generating an entitlement control message R-ECMc for recording the content of the flow as a function of a key KRc and at least one criterion CRR defining a right to the record, generating an entitlement control message P-ECMc controlling access to play back the content of the recorded flow as a function of a key KPc and at least one criterion CRP defining a right to play back, and on reception: analysing the messages P-ECMc and P-ECMc, authorizing the recording and playback if the criteria CRR and CRP are verified.
Public/Granted literature
- US20070150960A1 Method and system for conditional access applied to protection of content Public/Granted day:2007-06-28
Information query
