Telegraphy – Systems – Printing
Patent
1982-07-23
1985-07-23
Cangialosi, Salvatore
Telegraphy
Systems
Printing
358122, 358123, H04K 102
Patent
active
045310203
ABSTRACT:
A method of controlling the simultaneous broadcast of enciphered digital information signals, for example in a radio or television broadcast environment, to a plurality of subscribers provides several levels of enciphering keys. The broadcast digital information signal is in a broadcast common service enciphering key and communication between the transmitter and subscribers may take place in a box key or in a group enciphering key common to a group of subscribers having a common interest in the reception of broadcast signals of a particular type. Each receiver will decipher the broadcast digital information in a specific service key which is common to that broadcast. The service key may be changed at one or more subscribers by communicating the change in the service key to the subscribers by means of the group enciphering key. Further, the group enciphering key may be changed at one or more subscribers or new groups may be formed among subscribers by communicating to the subscribers in one or more group enciphering keys.
REFERENCES:
patent: 4193131 (1980-03-01), Lennon et al.
patent: 4203166 (1980-05-01), Ehrsam et al.
patent: 4288659 (1981-09-01), Atalla
patent: 4292650 (1981-09-01), Hendrickson
patent: 4323921 (1982-04-01), Guillou
patent: 4337483 (1982-06-01), Guillou
patent: 4348696 (1982-09-01), Beier
patent: 4354201 (1982-10-01), Sechet et al.
patent: 4388643 (1983-06-01), Aminetzeh
patent: 4460922 (1984-06-01), Ensinger et al.
patent: 4464678 (1984-08-01), Schiff et al.
Bluestein Leo I.
Drake David A.
Jedynak Leo
Simpson Larry W.
Wechselberger Anthony J.
Cangialosi Salvatore
Oak Industries Inc.
LandOfFree
Multi-layer encryption system for the broadcast of encrypted inf does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-layer encryption system for the broadcast of encrypted inf, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-layer encryption system for the broadcast of encrypted inf will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-635456