Cryptographic system for direct broadcast satellite network

Details Cryptographic system for direct broadcast satellite network Cryptographic system for direct broadcast satellite network

H - Electricity

04

K

350/20, 325/3

H04K 1/00 (2006.01) H04B 7/185 (2006.01) H04L 9/00 (2006.01) H04N 7/167 (2006.01) H04H 1/00 (2006.01)

Patent

CA 1244090

CRYPTOGRAPHIC SYSTEM FOR DIRECT BROADCAST SATELLITE NETWORK ABSTRACT OF THE DISCLOSURE A three key cryptographic system is used in the transmission of digitized signals to a plurality of receivers, each having a unique address number and a factory stored signature key which is a function of the address number. At the transmission end, a common key is generated and used to encrypt the signals to be transmitted. The signature key is generated for each receiver unit by encrypting the address number of the unit using a secret master key. The common key is then encrypted for use by each receiver using the generated signature key for that receiver. A data stream is inserted into the horizontal blanking inter- vals of the composite video signal. The data stream includes the encrypted signals receivable by all receivers and addressed ii portions, each receivable by a different receiver, containing the encrypted common key for that receiver. The receiver decrypts the common key with the stored signature key and uses it to decrypt the signals. Only a single master key must be stored and protected.

492404

Affiliated with

Also associated with

Rating

Cryptographic system for direct broadcast satellite network does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cryptographic system for direct broadcast satellite network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cryptographic system for direct broadcast satellite network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1246650