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1. (WO1997018651) AN ADAPTOR CARD PROVIDING CONDITIONAL ACCESS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/018651 International Application No.: PCT/US1996/000580
Publication Date: 22.05.1997 International Filing Date: 16.01.1996
IPC:
G06F 21/00 (2006.01) ,H04B 7/185 (2006.01) ,H04H 40/90 (2008.01) ,H04L 12/56 (2006.01) ,H04L 29/06 (2006.01) ,H04N 7/16 (2011.01) ,G06F 1/00 (2006.01)
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
21
Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
7
Radio transmission systems, i.e. using radiation field
14
Relay systems
15
Active relay systems
185
Space-based or airborne stations
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
H
BROADCAST COMMUNICATION
40
Arrangements specially adapted for receiving broadcast information
18
Arrangements characterised by circuits or components specially adapted for receiving
27
specially adapted for broadcast systems covered by groups H04H20/53-H04H20/86110
90
specially adapted for satellite broadcast receiving
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12
Data switching networks
54
Store-and-forward switching systems
56
Packet switching systems
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
29
Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/-H04L27/136
02
Communication control; Communication processing
06
characterised by a protocol
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
7
Television systems
16
Analogue secrecy systems; Analogue subscription systems
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
1
Details not covered by groups G06F3/-G06F13/82
Applicants:
HUGHES AIRCRAFT COMPANY [US/US]; 7200 Hughes Terrace Los Angeles, CA 90045-0066, US
Inventors:
DILLON, Douglas, M.; US
Agent:
LINDEEN, Gordon, R., III. ; Hughes Aircraft Company 7200 Hughes Terrace Los Angeles, CA 90045-0066, US
Priority Data:
08/557,39813.11.1995US
Title (EN) AN ADAPTOR CARD PROVIDING CONDITIONAL ACCESS
(FR) ADAPTATEUR SOUS FORME DE CARTE POUR UN ACCES CONDITIONNEL
Abstract:
(EN) A method and apparatus for an adaptor card (40), for use in a computer (50), to provide conditional access by the computer (50) to incoming data streams while maintaining the security of information by maintaining a listing of addresses corresponding to data streams which the computer (50) is authorized to receive, receiving and determining the address of a frame, determining whether the frame address matches an address maintained in an Access Table, and processing and transmitting only those frames of data streams with the computer (50) is authorized to receive.
(FR) L'invention concerne un adaptateur sous forme de carte destiné à un ordinateur, pour permettre un accès conditionnel par l'ordinateur à un flux de données entrantes, tout en assurant la sécurité de l'information. Ceci est réalisé en conservant une liste d'adresses correspondant aux flux de données que l'ordinateur est autorisé à recevoir, en recevant et en déterminant l'adresse des trames, en déterminant si l'adresse des trames correspond à une adresses conservée dans un tableau d'accès et en traitant et transmettant uniquement les trames de flux de données que l'ordinateur est autorisé à recevoir.
Designated States: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, JP, KE, KG, KP, KR, KZ, LK, LR, LT, LU, LV, MD, MG, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TT, UA, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (KE, LS, MW, SD, SZ, UG)
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
MXPA/a/1997/006179IL121486EP0803155CA2218039AU1996066736