FR1057922A - Device for swapping the order of a group of pulses and applying to a secret multiplex link - Google Patents

Device for swapping the order of a group of pulses and applying to a secret multiplex link

Info

Publication number
FR1057922A
FR1057922A FR1057922DA FR1057922A FR 1057922 A FR1057922 A FR 1057922A FR 1057922D A FR1057922D A FR 1057922DA FR 1057922 A FR1057922 A FR 1057922A
Authority
FR
France
Prior art keywords
swapping
secret
pulses
applying
group
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
Other languages
French (fr)
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.)
Societe Francaise Radio Electrique
Original Assignee
Societe Francaise Radio Electrique
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 Societe Francaise Radio Electrique filed Critical Societe Francaise Radio Electrique
Application granted granted Critical
Publication of FR1057922A publication Critical patent/FR1057922A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/06—Secret communication by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • 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
    • H04L9/0891—Revocation or update of secret information, e.g. encryption key update or rekeying
    • 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
    • H04L9/34—Bits, or blocks of bits, of the telegraphic message being interchanged in time

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Dc Digital Transmission (AREA)
  • Pulse Circuits (AREA)
FR1057922D 1951-12-20 1951-12-20 Device for swapping the order of a group of pulses and applying to a secret multiplex link Expired FR1057922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR945036X 1951-12-20

Publications (1)

Publication Number Publication Date
FR1057922A true FR1057922A (en) 1954-03-11

Family

ID=9472094

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1057922D Expired FR1057922A (en) 1951-12-20 1951-12-20 Device for swapping the order of a group of pulses and applying to a secret multiplex link

Country Status (4)

Country Link
BE (1) BE516210A (en)
DE (1) DE945036C (en)
FR (1) FR1057922A (en)
GB (1) GB714908A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222809A1 (en) * 1973-03-19 1974-10-18 Patelhold Patentverwertung

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1135971B (en) * 1959-02-26 1962-09-06 Siemens Ag Time division multiplex system
DE1139893B (en) * 1959-02-27 1962-11-22 Siemens Ag Time division multiplex system
NL136418C (en) * 1960-04-27
DE1206970B (en) * 1960-05-09 1965-12-16 Fuji Tsushinki Seizo Kabushiki Circuit arrangement for the time shifting of message channels in time division multiplex message systems
NL279100A (en) * 1961-05-30
BE620190A (en) * 1961-07-27
US3324246A (en) * 1963-07-16 1967-06-06 Bell Telephone Labor Inc Crosstalk reduction in a time division multiplex switching system
DE1278544B (en) * 1963-09-23 1968-09-26 Siemens Ag Method and circuit arrangement for transmitting several pulse-modulated telecommunications messages over a common transmission path in time division multiplex systems, in particular time division multiplex telephone exchanges

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE491725A (en) * 1948-11-13

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222809A1 (en) * 1973-03-19 1974-10-18 Patelhold Patentverwertung

Also Published As

Publication number Publication date
DE945036C (en) 1956-06-28
GB714908A (en) 1954-09-01
BE516210A (en)

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