FR39968E - Printer cryptographic device - Google Patents

Printer cryptographic device

Info

Publication number
FR39968E
FR39968E FR39968DA FR39968E FR 39968 E FR39968 E FR 39968E FR 39968D A FR39968D A FR 39968DA FR 39968 E FR39968 E FR 39968E
Authority
FR
France
Prior art keywords
printer
cryptographic device
cryptographic
printer 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
Francois Schimmel
Eugene-Auguste Bidault
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 FR39968E publication Critical patent/FR39968E/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
    • G09C1/04—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 with sign carriers or indicators moved relative to one another to positions determined by a permutation code, or key, so as to indicate the appropriate corresponding clear or ciphered text

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
FR39968D 1930-08-13 1930-08-13 Printer cryptographic device Expired FR39968E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR39968T 1930-08-13

Publications (1)

Publication Number Publication Date
FR39968E true FR39968E (en) 1932-03-21

Family

ID=8676302

Family Applications (1)

Application Number Title Priority Date Filing Date
FR39968D Expired FR39968E (en) 1930-08-13 1930-08-13 Printer cryptographic device

Country Status (1)

Country Link
FR (1) FR39968E (en)

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