H - Electricity – 04 – M
Patent
H - Electricity
04
M
350/20
H04M 1/32 (2006.01) H04N 7/167 (2006.01)
Patent
CA 1328501
ABSTRACT OF THE DISCLOSURE In a secure communications system, a key number which is changed periodically, e.g. monthly, and a ran- dom number from a random number generator are combined and used as a seed to reset a Pn sequence generator, with the output of the generator being used to control encryption of transmission data in a signal processor. The key is also provided to a first encipherer to en- cipher the random number for transmission with the en- crypted data. At the receiver, the key is provided in common to a decipherer for deciphering the random number and a Pn sequence generator which is periodically reset by the combination of the key and random number in the same manner as in the transmitter. The Pn sequence is then used to decrypt the information. User identifica- tion codes are stored in the transmitter and are used to encipher the key, with each employing its ID code to decipher the key. The user ID codes are known only to the system operator, so that not even a particular user can know the key.
613072
Fang Russell J.
Lin-Nan Lee
Communications Satellite Corporation
G. Ronald Bell & Associates
LandOfFree
Security system for sstv encryption does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Security system for sstv encryption, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Security system for sstv encryption will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1185200