GB1134791A - Ciphering or deciphering system for multiplex communication link - Google Patents

Ciphering or deciphering system for multiplex communication link

Info

Publication number
GB1134791A
GB1134791A GB4792666A GB4792666A GB1134791A GB 1134791 A GB1134791 A GB 1134791A GB 4792666 A GB4792666 A GB 4792666A GB 4792666 A GB4792666 A GB 4792666A GB 1134791 A GB1134791 A GB 1134791A
Authority
GB
United Kingdom
Prior art keywords
cipher
channel
signal
stores
input
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
GB4792666A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 by CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB1134791A publication Critical patent/GB1134791A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
    • 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
    • H04L9/0637—Modes of operation, e.g. cipher block chaining [CBC], electronic codebook [ECB] or Galois/counter mode [GCM]
    • 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
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H04L9/0877—Generation of secret information including derivation or calculation of cryptographic keys or passwords using additional device, e.g. trusted platform module [TPM], smartcard, USB or hardware security module [HSM]
    • 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
    • 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

Abstract

1,134,791. Data transmission systems. CSFCOMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. 25 Oct., 1966 [8 Nov., 1965], No. 47926/66. Heading H4P. In a ciphering or deciphering apparatus associated with a plurality of digital data channels, the channels are selected in turn and the cipher key is changed in sequence with the selection so that signals on any one channel are mixed only with an associated cipher key. The input channels feed respective input stores which are read out in turn to a mixing unit which also receives a key signal from a cipher generator. The mixing unit output is the required ciphered or deciphered data, and is passed to an appropriate one of a number of output stores, there being one such store per channel. When a signal on any one channel, e.g. C, has been ciphered or deciphered the corresponding cipher key signal is passed to a cipher store associated with channel C. When next the input channel C is selected, the associated cipher store passes the cipher signal stored therein to preset the cipher generator, which then generates the next cipher signal relevant to channel C for mixing with the signal on channel C. The input stores may be selected in a fixed sequence or as they become full, the output and cipher stores being selected in the corresponding order.
GB4792666A 1965-11-08 1966-10-25 Ciphering or deciphering system for multiplex communication link Expired GB1134791A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR37619A FR1463957A (en) 1965-11-08 1965-11-08 Encryption system for multiplex link

Publications (1)

Publication Number Publication Date
GB1134791A true GB1134791A (en) 1968-11-27

Family

ID=8592050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4792666A Expired GB1134791A (en) 1965-11-08 1966-10-25 Ciphering or deciphering system for multiplex communication link

Country Status (6)

Country Link
BE (1) BE689357A (en)
CH (1) CH476430A (en)
DE (1) DE1263812B (en)
FR (1) FR1463957A (en)
GB (1) GB1134791A (en)
NL (1) NL6615730A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784743A (en) * 1972-08-23 1974-01-08 Bell Telephone Labor Inc Parallel data scrambler

Also Published As

Publication number Publication date
FR1463957A (en) 1966-07-22
CH476430A (en) 1969-07-31
NL6615730A (en) 1967-05-09
BE689357A (en) 1967-05-08
DE1263812B (en) 1968-03-21

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