H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/24
H04N 7/16 (2006.01) H04N 7/167 (2006.01)
Patent
CA 1157144
ABSTRACT OF THE DISCLOSURE A system for transmitting information between an emitting center and receiving stations, comprising: a subscription administration center generating a plu- rality of subscriber's keys Ci changing randomly at relatively long intervals of the order of a month; in the emitting center: a generator of an operating key K changing randomly at relatively short intervals of the order of a few minutes; a circuit for forming messages Mi obtained from said subscriber's keys Ci and from the operating key K by means of an algorithm, all the mes- mages Mi then being directed towards the emitting center; and automatic encryption means using the ope- rating key K, in each receiving station: a subscription holder on which is recorded a signal corresponding to at least one of the subscriber's keys Ci; a circuit for restoring the operating key receiving the messages Mi and the subscriber's key Ci, this circuit working out an algorithm for restoring the signal corresponding to the operating key K used in the emitting center; an au- tomatic decryption means; and at least one charging station capable of temporarily receiving the subscrip- tion holders and permanently recording one of the sub- scribers's key Ci thereon.
344684
Etablissement Public de Diffusion Dit "telediffusion de France"
Etat Francais Represente Par Le Secretaire D'etat Aux Postes Et Telecommunicat
Goudreau Gage Dubuc
LandOfFree
System for transmitting information between an emitting... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for transmitting information between an emitting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for transmitting information between an emitting... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-966652