FR812481A - Improvements to certain cryptographic devices - Google Patents

Improvements to certain cryptographic devices

Info

Publication number
FR812481A
FR812481A FR812481DA FR812481A FR 812481 A FR812481 A FR 812481A FR 812481D A FR812481D A FR 812481DA FR 812481 A FR812481 A FR 812481A
Authority
FR
France
Prior art keywords
cryptographic devices
certain cryptographic
certain
devices
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
Albert Antoine Marie Gentet
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 FR812481A publication Critical patent/FR812481A/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)
FR812481D 1936-10-24 1936-10-24 Improvements to certain cryptographic devices Expired FR812481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR812481T 1936-10-24

Publications (1)

Publication Number Publication Date
FR812481A true FR812481A (en) 1937-05-11

Family

ID=9265644

Family Applications (1)

Application Number Title Priority Date Filing Date
FR812481D Expired FR812481A (en) 1936-10-24 1936-10-24 Improvements to certain cryptographic devices

Country Status (1)

Country Link
FR (1) FR812481A (en)

Similar Documents

Publication Publication Date Title
FR829244A (en) Improvements to cryptographic machines
FR828977A (en) Improvements to projection devices
FR830766A (en) Improvements to cryptographic machines or devices
FR812481A (en) Improvements to certain cryptographic devices
FR818140A (en) Shredder
FR810044A (en) Bundling device
FR47767E (en) Improvements to mechanical plastering devices
FR809744A (en) Improvements to sorting devices
FR809184A (en) Improvements to drawing devices
FR47982E (en) Improvements to hemming devices
FR827146A (en) Improvements to dispensing devices
FR821898A (en) Piezoelectric devices
FR808613A (en) Improvements to prepaid devices
FR822765A (en) Improvements to stereographometers
FR806487A (en) Elastic lace
FR806613A (en) Improvements to recording devices
FR819074A (en) Improvements to devices used to diffuse volatilisable agents
FR812184A (en) Improvements to advertising devices
FR823144A (en) Jaw crusher
FR811730A (en) Improvements to thermostatic devices
FR816879A (en) Improvements to swimming devices
FR829760A (en) Improvements to gyroscopic devices
FR830884A (en) Improvements to cinematographic devices
FR47470E (en) Improvements to episcopic devices
FR805415A (en) Improvements to episcopic devices