Cryptography – Communication system using cryptography – Data stream/substitution enciphering
Patent
1992-09-30
1994-04-26
Cangialosi, Salvatore
Cryptography
Communication system using cryptography
Data stream/substitution enciphering
380 22, 380 46, H04L 902
Patent
active
053074122
ABSTRACT:
In a random coding cipher system and method, a sender and receiver pair share a long string of random digits, the masking tape. To encrypt a plaintext message, the sender generates a random integer (with a random number generator, RNG) or a pseudo-random integer (using a pseudo-random number generator, PRNG). This is the initializing integer. The sender then selects an integer formed from a subset of the digits of the initializing integer. This is the starting integer for the message. The starting integer determines a starting, or indexing, position in the masking tape for extraction of a sequence of blocks of digits, of common length, to be put in one-to-one correspondence with the characters of the plaintext alphabet used for communication. The integer blocks comprise the numerical synonyms for the plaintext alphabet characters. By checking successive candidate digit blocks for prior association with plaintext alphabet characters, the one-to-one correspondence between numerical synonyms and alphabet characters is maintained. The concatenation of the numerical synonyms corresponding to successive message characters comprises the plaintext message string integer. A string of digits from the masking tape, beginning immediately after the last integer chosen for coding alphabet characters and of length equal to that of the plaintext message string, is added to the plaintext message string. This new random digit string is the masking tape string integer. The sum of the plaintext message string and the masking tape string is the ciphertext string integer which, preceded by the initializing integer, is sent as the cryptogram. To decrypt, the receiver uses the starting integer to determine the numerical synonyms and masking tape string, subtracts the masking tape string from the ciphertext string and recovers the plaintext message string and the plaintext message.
REFERENCES:
patent: 2730569 (1956-01-01), Street
patent: 2949501 (1960-08-01), Hell
patent: 3067280 (1962-12-01), Schlafly, Jr.
patent: 3911216 (1975-10-01), Bartek et al.
patent: 4193131 (1980-03-01), Lennon et al.
patent: 4202051 (1980-05-01), Davida et al.
patent: 4206315 (1980-06-01), Matyas et al.
patent: 4301327 (1981-11-01), Lee et al.
patent: 4326098 (1982-04-01), Bouricius et al.
patent: 4341925 (1982-07-01), Doland
patent: 4369434 (1983-01-01), Mueller
patent: 4408093 (1983-10-01), Place
patent: 4418275 (1983-11-01), Oosterbaan et al.
patent: 4441095 (1984-04-01), Widmer et al.
patent: 4447672 (1984-05-01), Nakamura
patent: 4488001 (1984-12-01), Cooley et al.
patent: 4638120 (1987-01-01), Herve
patent: 4667301 (1987-05-01), Chiu et al.
patent: 4751733 (1988-06-01), Delayaye et al.
patent: 4776011 (1988-10-01), Busby
patent: 4791669 (1988-12-01), Kage
patent: 4853962 (1989-08-01), Brockman
patent: 4979832 (1990-12-01), Ritter
patent: 5038376 (1991-08-01), Mittenthal
patent: 5133444 (1992-05-01), Vobach
patent: 5193115 (1993-03-01), Vobach
patent: 5214704 (1993-05-01), Mittenthal
"An Introduction to TRIARCH 2000", Jul. 1989, Rich, Inc., pp. 2-30, 76 Beaver St, 14th floor, New York, NY 10005.
"TRIARCH 2000 Trading Information Architecture", 5 pages, Rich Inc., A Reuter Co. 1989.
"Trading Room Systems", Product Information Brochure, Rich Inc., A Reuter Co., 4 pages, Apr. 15, 1989.
"Trading Information Systems Requirements, An Overview", J. Naden et al. IEEE Comm. Sec., New York Section Seminar, Dec. 4, 1986, pp. 1-12.
LandOfFree
Random coding cipher system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Random coding cipher system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Random coding cipher system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1718170