Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1984-10-17
1987-06-30
Weldon, Ulysses
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
34082527, 34082531, 34082526, 380 43, H04Q 100
Patent
active
046774343
ABSTRACT:
An apparatus and a method of providing an access control for transmitted stock market data from a central radio station to a plurality of one-way radio receivers. Into each receiver is inputted an access code including a cypher pointer which provides for scrambling of the remainder of the access code which includes the authorized services, the service cutoff date, and the unit serial number which is unique to a particular receiver. The cypher pointer is used to rotate a common map in the receiver used for unscrambling and in the central station used for scrambling. In order to receive service, the permanently stored serial number of the unit must compare with the serial number of the access code, the cutoff date must be greater than the present system date transmitted from the central station, and there must be an authorized service class.
REFERENCES:
patent: 3387268 (1968-06-01), Epstein
patent: 3611294 (1971-10-01), O'Neill et al.
patent: 4070693 (1978-01-01), Shutterly
patent: 4176321 (1979-11-01), Horn
patent: 4323881 (1982-04-01), Mori
patent: 4410911 (1983-10-01), Field et al.
patent: 4473824 (1984-09-01), Claytor
Lotus Information Network Corp.
Weldon Ulysses
LandOfFree
Access control system for transmitting data from a central stati does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Access control system for transmitting data from a central stati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Access control system for transmitting data from a central stati will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-450418