EP 1749401 A1 20070207 - METHOD FOR TRANSMISSION OF DIGITAL DATA TO A GROUP OF TARGET RECEIVER TERMINALS
Title (en)
METHOD FOR TRANSMISSION OF DIGITAL DATA TO A GROUP OF TARGET RECEIVER TERMINALS
Title (de)
VERFAHREN ZUR ÜBERTRAGUNG VON DIGITALEN DATEN AN EINE GRUPPE AUS ZIELEMPFÄNGERENDGERÄTEN
Title (fr)
PROCEDE DE DIFFUSION DE DONNEES NUMERIQUES A UN PARC DE TERMINAUX RECEPTEURS CIBLE
Publication
Application
Priority
- FR 2005050358 W 20050524
- FR 0451064 A 20040528
Abstract (en)
[origin: WO2005120066A1] The invention relates to a method for the transmission of digital data to a group of target receiver terminals wherein said data is scrambled prior thereto by a series of control words transmitted in a conditional access control method. The method consists in the following: transmission -customization of the access control method by a reversible F function wherein the F<-1>inverse function can be executed solely in the terminals of the target group; reception: recovery of the original control message in each terminal of the target group by means of said inverse function.
IPC 8 full level
H04N 5/00 (2011.01); H04N 7/16 (2011.01); H04N 7/167 (2011.01)
CPC (source: EP KR US)
H04N 7/163 (2013.01 - EP US); H04N 7/1675 (2013.01 - EP US); H04N 21/23476 (2013.01 - EP US); H04N 21/266 (2013.01 - KR); H04N 21/26606 (2013.01 - EP US); H04N 21/44055 (2013.01 - EP US); H04N 21/4623 (2013.01 - EP US)
Citation (search report)
See references of WO 2005120066A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2871017 A1 20051202; FR 2871017 B1 20080229; CN 101032167 A 20070905; EP 1749401 A1 20070207; KR 101366812 B1 20140221; KR 20070030798 A 20070316; US 2007223695 A1 20070927; US 8259940 B2 20120904; WO 2005120066 A1 20051215
DOCDB simple family (application)
FR 0451064 A 20040528; CN 200580016924 A 20050524; EP 05766645 A 20050524; FR 2005050358 W 20050524; KR 20067024794 A 20050524; US 59753605 A 20050524