FR2363831A1 - METHOD AND DEVICE FOR ENCODING OR DECODING BLOCKS OF DATA IN A REPRESENTATION IN BINARY FORM - Google Patents
METHOD AND DEVICE FOR ENCODING OR DECODING BLOCKS OF DATA IN A REPRESENTATION IN BINARY FORMInfo
- Publication number
- FR2363831A1 FR2363831A1 FR7725568A FR7725568A FR2363831A1 FR 2363831 A1 FR2363831 A1 FR 2363831A1 FR 7725568 A FR7725568 A FR 7725568A FR 7725568 A FR7725568 A FR 7725568A FR 2363831 A1 FR2363831 A1 FR 2363831A1
- Authority
- FR
- France
- Prior art keywords
- data
- encoding
- representation
- binary form
- bits
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/12—Details relating to cryptographic hardware or logic circuitry
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Storage Device Security (AREA)
- Facsimile Transmission Control (AREA)
- Image Processing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
L'invention concerne un procédé et un dispositif pour coder ou décoder des blocs de données suivant une représentation sous forme binaire. Dans un dispositif comportant un registre à décalage de données DSR relié à un multiplexeur MUX1 raccordé à des compteurs DZ, ZZ, et à un multiplexeur MUX2 raccordé à une mémoire de code SP ainsi qu'un registre de sortie de données DAR, chaque groupe de bits d'un bloc de données est subdivisé en n groupes de bits de chacun 2 caractères et forme une adresse pour un groupe de code de la mémoire SP, et des transformations alternées, linéaires et non linéaires, se répètent de façon alternée suivant 2n cycles avec codage du bloc de données. Application notamment aux installations de télé-traitement des données.The invention relates to a method and a device for encoding or decoding data blocks according to a representation in binary form. In a device comprising a DSR data shift register connected to a multiplexer MUX1 connected to counters DZ, ZZ, and to a multiplexer MUX2 connected to a code memory SP as well as a data output register DAR, each group of bits of a data block is subdivided into n groups of bits of each 2 characters and forms an address for a code group of the SP memory, and alternating linear and non-linear transformations are repeated alternately in 2n cycles with data block coding. Application in particular to remote data processing installations.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19762639806 DE2639806C2 (en) | 1976-09-03 | 1976-09-03 | Method and device for encrypting or decrypting data blocks in binary representation |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2363831A1 true FR2363831A1 (en) | 1978-03-31 |
FR2363831B1 FR2363831B1 (en) | 1982-12-10 |
Family
ID=5987117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7725568A Granted FR2363831A1 (en) | 1976-09-03 | 1977-08-22 | METHOD AND DEVICE FOR ENCODING OR DECODING BLOCKS OF DATA IN A REPRESENTATION IN BINARY FORM |
Country Status (8)
Country | Link |
---|---|
AT (1) | AT372559B (en) |
BE (1) | BE858377A (en) |
CH (1) | CH618803A5 (en) |
DE (1) | DE2639806C2 (en) |
FR (1) | FR2363831A1 (en) |
GB (1) | GB1542350A (en) |
IT (1) | IT1087364B (en) |
NL (1) | NL7709716A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2467515A1 (en) * | 1979-10-10 | 1981-04-17 | Telediffusion Fse | SYSTEM FOR ENCRYPTING AND DECRYPTING A DIGITAL SIGNAL |
NL188925C (en) * | 1982-11-11 | 1992-11-02 | Philips Nv | METHOD AND APPARATUS FOR DISPLAYING FIGURED INFORMATION |
DE4114777A1 (en) * | 1990-05-22 | 1992-02-06 | Peter Elsner | METHOD AND DEVICE FOR ENCRYPTING NEWS |
CN118094608A (en) * | 2024-04-29 | 2024-05-28 | 山东水文印务有限公司 | Hydrologic data management method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3796830A (en) * | 1971-11-02 | 1974-03-12 | Ibm | Recirculating block cipher cryptographic system |
USB559737I5 (en) * | 1974-03-20 | 1976-01-20 |
-
1976
- 1976-09-03 DE DE19762639806 patent/DE2639806C2/en not_active Expired
-
1977
- 1977-07-25 CH CH916577A patent/CH618803A5/en not_active IP Right Cessation
- 1977-08-22 FR FR7725568A patent/FR2363831A1/en active Granted
- 1977-08-25 AT AT616777A patent/AT372559B/en not_active IP Right Cessation
- 1977-09-01 IT IT2716377A patent/IT1087364B/en active
- 1977-09-01 GB GB3643877A patent/GB1542350A/en not_active Expired
- 1977-09-02 BE BE180658A patent/BE858377A/en unknown
- 1977-09-02 NL NL7709716A patent/NL7709716A/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3796830A (en) * | 1971-11-02 | 1974-03-12 | Ibm | Recirculating block cipher cryptographic system |
USB559737I5 (en) * | 1974-03-20 | 1976-01-20 |
Also Published As
Publication number | Publication date |
---|---|
AT372559B (en) | 1983-10-25 |
DE2639806C2 (en) | 1978-06-22 |
GB1542350A (en) | 1979-03-14 |
CH618803A5 (en) | 1980-08-15 |
IT1087364B (en) | 1985-06-04 |
BE858377A (en) | 1978-03-02 |
DE2639806B1 (en) | 1977-10-13 |
FR2363831B1 (en) | 1982-12-10 |
NL7709716A (en) | 1978-03-07 |
ATA616777A (en) | 1983-02-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |