FR710604A - Improvements to cryptographic devices - Google Patents

Improvements to cryptographic devices

Info

Publication number
FR710604A
FR710604A FR710604DA FR710604A FR 710604 A FR710604 A FR 710604A FR 710604D A FR710604D A FR 710604DA FR 710604 A FR710604 A FR 710604A
Authority
FR
France
Prior art keywords
cryptographic devices
cryptographic
devices
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
Paul Godillon
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 FR710604A publication Critical patent/FR710604A/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)
FR710604D 1931-02-04 1931-02-04 Improvements to cryptographic devices Expired FR710604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR710604T 1931-02-04

Publications (1)

Publication Number Publication Date
FR710604A true FR710604A (en) 1931-08-27

Family

ID=9072320

Family Applications (1)

Application Number Title Priority Date Filing Date
FR710604D Expired FR710604A (en) 1931-02-04 1931-02-04 Improvements to cryptographic devices

Country Status (1)

Country Link
FR (1) FR710604A (en)

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