Cryptography – Key management – Having particular key generator
Patent
1982-06-25
1987-04-28
Cangialosi, Salvatore
Cryptography
Key management
Having particular key generator
380 50, H04K 102
Patent
active
046619801
ABSTRACT:
A secure communication system, which may be safely used even in the prese of an enemy interceptor, includes a transmitter and a receiver.
The transmitter comprises a first modulo-2 adder, having as one input a sequence of N-bit binary numbers. A first random read-only memory (ROM), comprises a plurality of storage cells. The input of the ROM is connected to the output of the modulo-2 adder. Each of the cells of the ROM, which have distinct addresses, contain a random number, with no two cells containing the same random number. The input to the ROM is a binary number representing a specific address, whereas the output of the ROM is a signal representing a random binary number. A delay line has its input connected to the output of the random read-only memory, its output constituting the second input to the modulo-2 adder. A second random ROM, having the same type of hardware but different random content, has its input connected to the output of the delay line. A second modulo-2 adder has its two inputs connected to the outputs of the first and second random read-only memories, the sequence of binary bits to be transmitted appearing at its output. Another component of the transmitter is a buffer memory, whose input and output are connected to the output of the second modulo-2 adder, the sequence of binary words to be transmitted appearing at the output of the second modulo-2 adder.
REFERENCES:
patent: 3484745 (1969-12-01), Sourgens
patent: 3536833 (1970-10-01), Guanella
patent: 3641494 (1972-02-01), Perrault et al.
patent: 3731197 (1973-05-01), Clark
patent: 3773977 (1973-11-01), Guanella
patent: 3868633 (1975-02-01), Neuse
patent: 3921151 (1975-11-01), Guanella
patent: 3925612 (1975-12-01), Guanella et al.
patent: 3970790 (1976-07-01), Guanella
patent: 4011408 (1977-03-01), Miller
patent: 4074066 (1978-02-01), Ehrsam et al.
patent: 4078152 (1978-03-01), Tuckerman, III
patent: 4079195 (1978-03-01), Frutiger
patent: 4092630 (1978-05-01), Van Duuren et al.
patent: 4125744 (1978-11-01), Goodall
patent: 4145568 (1979-03-01), Ehrat
patent: 4181816 (1980-01-01), Vasseur
IBM Tech. Discl. Bull., vol. 24, No. 6, (11/81), pp. 2892-2896, Tang et al.
IBM Tech. Discl. Bull., vol. 24, No. 6 (11/81), pp. 2886-2891, Lin et al.
IBM Tech. Discl. Bull., vol. 22, No. 9 (2/80), pp. 4287-4290, Anch et al.
Cangialosi Salvatore
Johnston Ervin F.
Stan John
The United States of America as represented by the Secretary of
LandOfFree
Intercept resistant data transmission system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Intercept resistant data transmission system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intercept resistant data transmission system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-481283