GB1249520A – Improvements in or relating to teleprinter systems
– Google Patents
GB1249520A – Improvements in or relating to teleprinter systems
– Google Patents
Improvements in or relating to teleprinter systems
Info
Publication number
GB1249520A
GB1249520A
GB3837369A
GB3837369A
GB1249520A
GB 1249520 A
GB1249520 A
GB 1249520A
GB 3837369 A
GB3837369 A
GB 3837369A
GB 3837369 A
GB3837369 A
GB 3837369A
GB 1249520 A
GB1249520 A
GB 1249520A
Authority
GB
United Kingdom
Prior art keywords
station
central station
ciphered
characters
output
Prior art date
1968-08-01
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
GB3837369A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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.)
1968-08-01
Filing date
1969-07-31
Publication date
1971-10-13
1969-07-31
Application filed by Siemens AG
filed
Critical
Siemens AG
1971-10-13
Publication of GB1249520A
publication
Critical
patent/GB1249520A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L63/00—Network architectures or network communication protocols for network security
H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L12/00—Data switching networks
H04L12/02—Details
H04L12/22—Arrangements for preventing the taking of data from a data transmission channel without authorisation
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
H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
H04L9/3226—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using a predetermined code, e.g. password, passphrase or PIN
Abstract
1,249,520. Digital transmission systems. SIEMENS A.G. 31 July, 1969 [1 Aug., 1968], No. 38373/69. Heading H4P. In a teleprinter system comprising a number of out-stations and a central station, e.g. an exchange, after setting up a connection between an out-station and the central station, e.g. by dialling, the out-station sends its identifying signal which, at the central station, is stored and selects a cipher key generator unique to the out-station. Subsequently a cipher code is transmitted by the out-station. This code consists of the output of a cipher key generator identical to that at the central station and comprising a shift register whose output is fed back and added to its input and to selected stages in the register. Alternatively the cipher code consists of a number of telegraph characters generated by the keyboard: in this case the code is also fed to the input of the out-station’s cipher key generator. At the central station the cipher code sets up the bistables in the selected generator so that the generators at the two stations have identical settings. The out-station now transmits the identifying signal in ciphered’ form. At the central station the signal is deciphered and compared with the stored plain language identifying signal. If the signals are identical, ciphered transmission can proceed. Characters from the keyboard are modulo-2 added to the cipher key generator output, the ciphered characters being transmitted in Start-Stop form. At the central station the ciphered characters are modulo-2 added to the output of the selected generator, the resulting deciphered signals being printed. The transmitted ciphered characters may be added to the output of the generators and fed back to the input of both generators for extra security. At the end of a message, or if transmission error is detected, the connection reverts to plain language mode. The feed back connections in the generators may be altered periodically
GB3837369A
1968-08-01
1969-07-31
Improvements in or relating to teleprinter systems
Expired
GB1249520A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE19681762669
DE1762669C3
(en)
1968-08-01
1968-08-01
Arrangement for transmitting messages from a called subscriber station, in particular a data processing system, to a calling subscriber station
Publications (1)
Publication Number
Publication Date
GB1249520A
true
GB1249520A
(en)
1971-10-13
Family
ID=5697132
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3837369A
Expired
GB1249520A
(en)
1968-08-01
1969-07-31
Improvements in or relating to teleprinter systems
Country Status (6)
Country
Link
BE
(1)
BE736966A
(en)
DE
(1)
DE1762669C3
(en)
FR
(1)
FR2014872A1
(en)
GB
(1)
GB1249520A
(en)
LU
(1)
LU59191A1
(en)
NL
(1)
NL6911330A
(en)
Families Citing this family (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2830894C3
(en)
*
1978-07-13
1981-05-21
Siemens AG, 1000 Berlin und 8000 München
Circuit arrangement for connecting at least two teletypewriters to a common connection line
1968
1968-08-01
DE
DE19681762669
patent/DE1762669C3/en
not_active
Expired
1969
1969-07-23
NL
NL6911330A
patent/NL6911330A/xx
unknown
1969-07-30
LU
LU59191D
patent/LU59191A1/xx
unknown
1969-07-31
FR
FR6926323A
patent/FR2014872A1/fr
not_active
Withdrawn
1969-07-31
GB
GB3837369A
patent/GB1249520A/en
not_active
Expired
1969-08-01
BE
BE736966D
patent/BE736966A/xx
unknown
Also Published As
Publication number
Publication date
DE1762669A1
(en)
1970-09-17
NL6911330A
(en)
1970-02-03
DE1762669B2
(en)
1973-06-07
DE1762669C3
(en)
1974-01-10
BE736966A
(en)
1970-02-02
LU59191A1
(en)
1969-12-10
FR2014872A1
(en)
1970-04-24
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None