FR812481A - Improvements to certain cryptographic devices - Google Patents
Improvements to certain cryptographic devicesInfo
- 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
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)
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) |
-
1936
- 1936-10-24 FR FR812481D patent/FR812481A/en not_active Expired
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