CA957947A - Method of and apparatus for encoded communications transmission - Google Patents
Method of and apparatus for encoded communications transmissionInfo
- Publication number
- CA957947A CA957947A CA139,894A CA139894A CA957947A CA 957947 A CA957947 A CA 957947A CA 139894 A CA139894 A CA 139894A CA 957947 A CA957947 A CA 957947A
- Authority
- CA
- Canada
- Prior art keywords
- communications transmission
- encoded communications
- encoded
- transmission
- communications
- 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
-
- 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
- H04L9/12—Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
-
- 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
- H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
- H04L9/0656—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH563571A CH539989A (en) | 1971-04-19 | 1971-04-19 | Method and device for encrypted message transmission |
Publications (1)
Publication Number | Publication Date |
---|---|
CA957947A true CA957947A (en) | 1974-11-19 |
Family
ID=4296906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA139,894A Expired CA957947A (en) | 1971-04-19 | 1972-04-18 | Method of and apparatus for encoded communications transmission |
Country Status (9)
Country | Link |
---|---|
CA (1) | CA957947A (en) |
CH (1) | CH539989A (en) |
DE (1) | DE2218447C3 (en) |
FR (1) | FR2136503A5 (en) |
GB (1) | GB1388035A (en) |
IT (1) | IT951865B (en) |
NL (1) | NL7205255A (en) |
NO (1) | NO135226C (en) |
SE (1) | SE380414B (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH578807A5 (en) * | 1974-11-05 | 1976-08-13 | Patelhold Patentverwertung | |
CH581930A5 (en) * | 1975-02-05 | 1976-11-15 | Europ Handelsges Anst | |
DE2507805C1 (en) * | 1975-02-24 | 1993-07-15 | Siemens Ag | Procedure for the phasing in of key devices |
DE2706421C2 (en) * | 1977-02-16 | 1979-03-15 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Procedure for setting ciphertext generators in encryption devices |
DE2908979C3 (en) * | 1979-03-08 | 1982-03-18 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Process for encrypted transmission of facsimile data |
US4288659A (en) * | 1979-05-21 | 1981-09-08 | Atalla Technovations | Method and means for securing the distribution of encoding keys |
ATE4762T1 (en) * | 1979-06-08 | 1983-10-15 | Gretag Aktiengesellschaft | DEVICE FOR ENCRYPTED TRANSMISSION OF MESSAGES. |
DE3003998A1 (en) * | 1980-02-04 | 1981-09-24 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | DATA ENCRYPTION AND DECRYLING SYSTEM |
DE3370918D1 (en) * | 1982-08-19 | 1987-05-14 | Bbc Brown Boveri & Cie | Method of synchronising encryption and decryption during the transmission of digital encrypted data, and apparatus for carrying out said method |
SE447859B (en) * | 1984-12-10 | 1986-12-15 | Datakonsult I Malmo Ab | Encoding and decoding appts. |
AU601370B2 (en) * | 1986-06-09 | 1990-09-13 | Datakonsult I Malmo Ab | Ciphering and deciphering device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1216921C2 (en) * | 1963-12-24 | 1976-05-13 | Gretag Ag | Method for the synchronization of the encryption and decryption of impulse-shaped, binary coded messages, in which the message clear pulses are mixed with key pulses on the sending side |
-
1971
- 1971-04-19 CH CH563571A patent/CH539989A/en not_active IP Right Cessation
-
1972
- 1972-04-17 NO NO132372A patent/NO135226C/no unknown
- 1972-04-17 DE DE19722218447 patent/DE2218447C3/en not_active Expired
- 1972-04-18 CA CA139,894A patent/CA957947A/en not_active Expired
- 1972-04-18 SE SE503172A patent/SE380414B/en unknown
- 1972-04-18 IT IT2328772A patent/IT951865B/en active
- 1972-04-18 FR FR7213651A patent/FR2136503A5/fr not_active Expired
- 1972-04-19 GB GB1820972A patent/GB1388035A/en not_active Expired
- 1972-04-19 NL NL7205255A patent/NL7205255A/xx not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
NO135226B (en) | 1976-11-22 |
SE380414B (en) | 1975-11-03 |
CH539989A (en) | 1973-07-31 |
IT951865B (en) | 1973-07-10 |
DE2218447C3 (en) | 1981-05-14 |
GB1388035A (en) | 1975-03-19 |
DE2218447A1 (en) | 1972-10-26 |
DE2218447B2 (en) | 1980-09-11 |
NO135226C (en) | 1977-03-02 |
FR2136503A5 (en) | 1972-12-22 |
NL7205255A (en) | 1972-10-23 |
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