GB1318921A - Method and apparatus for coding messages - Google Patents

Method and apparatus for coding messages

Info

Publication number
GB1318921A
GB1318921A GB5627470A GB5627470A GB1318921A GB 1318921 A GB1318921 A GB 1318921A GB 5627470 A GB5627470 A GB 5627470A GB 5627470 A GB5627470 A GB 5627470A GB 1318921 A GB1318921 A GB 1318921A
Authority
GB
United Kingdom
Prior art keywords
code
secret
supplementary
generator
cyphering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5627470A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
Original Assignee
Ciba Geigy AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Publication of GB1318921A publication Critical patent/GB1318921A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C1/00—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
    • G09C1/06—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member
    • G09C1/14—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member involving removable or interchangeable coding numbers, e.g. master tapes, punched cards

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Storage Device Security (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
GB5627470A 1969-11-29 1970-11-26 Method and apparatus for coding messages Expired GB1318921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1773669A CH516854A (de) 1969-11-29 1969-11-29 Verfahren und Vorrichtung zur chiffrierten Übermittlung von Informationen

Publications (1)

Publication Number Publication Date
GB1318921A true GB1318921A (en) 1973-05-31

Family

ID=4427698

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5627470A Expired GB1318921A (en) 1969-11-29 1970-11-26 Method and apparatus for coding messages

Country Status (7)

Country Link
US (1) US3711645A (enExample)
CA (1) CA922233A (enExample)
CH (1) CH516854A (enExample)
DE (1) DE2058285C3 (enExample)
FR (1) FR2072409A5 (enExample)
GB (1) GB1318921A (enExample)
SE (1) SE360535B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531021A (en) * 1980-06-19 1985-07-23 Oak Industries Inc. Two level encripting of RF signals

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808355A (en) * 1972-06-27 1974-04-30 Cutler Hammer Inc Secret signaling system
US3784743A (en) * 1972-08-23 1974-01-08 Bell Telephone Labor Inc Parallel data scrambler
US3813493A (en) * 1972-12-07 1974-05-28 P Hughes Secure data transmission apparatus
US3911216A (en) * 1973-12-17 1975-10-07 Honeywell Inf Systems Nonlinear code generator and decoder for transmitting data securely
US4107458A (en) * 1976-08-23 1978-08-15 Constant James N Cipher computer and cryptographic system
US4341925A (en) * 1978-04-28 1982-07-27 Nasa Random digital encryption secure communication system
GB2047506B (en) * 1978-05-03 1982-11-24 Atalla Technovations Method and apparatus for securing data transmissions
US4223403A (en) * 1978-06-30 1980-09-16 International Business Machines Corporation Cryptographic architecture for use with a high security personal identification system
DE2943726C2 (de) * 1979-10-30 1984-06-07 ANT Nachrichtentechnik GmbH, 7150 Backnang Verfahren und Einrichtung zur Ver- und Entschlüsselung von Daten
US4429180A (en) 1980-05-19 1984-01-31 The United States Of America As Represented By The Director Of The National Security Agency Apparatus for simultaneous generation of key at two locations
IL63102A (en) * 1980-06-19 1984-03-30 Oak Industries Inc System for enciphering messages
DE3207040A1 (de) * 1982-02-26 1983-09-08 Siemens AG, 1000 Berlin und 8000 München Vefahren und anordnung zum uebertragen von zeichen
DE3410937A1 (de) * 1984-03-24 1985-10-03 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren zum erkennen der unerlaubten benutzung einer indentifizierung
US4747139A (en) * 1984-08-27 1988-05-24 Taaffe James L Software security method and systems
DE3534416A1 (de) * 1985-09-27 1987-04-02 Detlef Keiler Verfahren zur sicherung von datenuebertragungen
US4791669A (en) * 1985-11-30 1988-12-13 Nec Corporation Encryption/decryption system
RU2140709C1 (ru) * 1997-12-16 1999-10-27 Молдовян Александр Андреевич Способ криптографического преобразования блоков цифровых данных
WO2000052690A1 (en) * 1999-02-26 2000-09-08 Hitachi, Ltd. Digital signal recorder, reproducer and recording medium
RU2211541C2 (ru) * 2001-11-08 2003-08-27 Государственное унитарное предприятие Специализированный центр программных систем "Спектр" Способ криптографического преобразования блоков цифровых данных

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH402937A (de) * 1961-08-18 1965-11-30 Gretag Ag Verfahren zur Verschlüsselung von impulsförmig übertragenen Nachrichten
US3614316A (en) * 1964-05-20 1971-10-19 Us Navy Secure communication system
CH439820A (de) * 1964-11-06 1967-07-15 Gretag Ag Verfahren und Einrichtung zur Ver- und Entschlüsselung von Nachrichtensignalen
CH435363A (de) * 1965-11-26 1967-05-15 Patelhold Patentverwertung Einrichtung zur Synchronisierung von Impulsgeneratoren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531021A (en) * 1980-06-19 1985-07-23 Oak Industries Inc. Two level encripting of RF signals

Also Published As

Publication number Publication date
SE360535B (enExample) 1973-09-24
CA922233A (en) 1973-03-06
DE2058285A1 (de) 1971-06-03
CH516854A (de) 1971-12-15
US3711645A (en) 1973-01-16
FR2072409A5 (enExample) 1971-09-24
DE2058285B2 (de) 1979-06-28
DE2058285C3 (de) 1980-03-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee