FR853278A - Cryptographic system - Google Patents

Cryptographic system

Info

Publication number
FR853278A
FR853278A FR853278DA FR853278A FR 853278 A FR853278 A FR 853278A FR 853278D A FR853278D A FR 853278DA FR 853278 A FR853278 A FR 853278A
Authority
FR
France
Prior art keywords
cryptographic system
cryptographic
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
Other languages
French (fr)
Inventor
Verdan Charles Emile
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 filed Critical
Application granted granted Critical
Publication of FR853278A publication Critical patent/FR853278A/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)
FR853278D 1939-04-21 1939-04-21 Cryptographic system Expired FR853278A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR853278T 1939-04-21

Publications (1)

Publication Number Publication Date
FR853278A true FR853278A (en) 1940-03-14

Family

ID=9326997

Family Applications (1)

Application Number Title Priority Date Filing Date
FR853278D Expired FR853278A (en) 1939-04-21 1939-04-21 Cryptographic system

Country Status (1)

Country Link
FR (1) FR853278A (en)

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