[go: up one dir, main page]

GB1499974A - Synchronising random-character generators of a secure message transmission system - Google Patents

Synchronising random-character generators of a secure message transmission system

Info

Publication number
GB1499974A
GB1499974A GB5391571A GB5391571A GB1499974A GB 1499974 A GB1499974 A GB 1499974A GB 5391571 A GB5391571 A GB 5391571A GB 5391571 A GB5391571 A GB 5391571A GB 1499974 A GB1499974 A GB 1499974A
Authority
GB
United Kingdom
Prior art keywords
random
transmission system
synchronising
message transmission
character generators
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
GB5391571A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1499974A publication Critical patent/GB1499974A/en
Expired legal-status Critical Current

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
    • H04L9/065—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
    • H04L9/0662—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher with particular pseudorandom sequence generator
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

1499974 Random number generators LICENTIA PATENT - VERWALTUNGS - GmbH 19 Nov 1971 [30 Nov 1970] 53915/71 Heading G4D [Also in Division H4] Random character generators ZG1, ZG2 of a cryptographic transmission system each have n counters or shift registers Z1 . . . Zn, Z1<SP>1</SP> ... Zn<SP>1</SP> advanced in single steps by a timing pulse source 31 or 47. Each time a counter reaches its maximum contact it passes a pulse to a compiler 32 or 48 in which the random characters are produced. The following abridgments are included in this series since the Specifications were through an error, not allotted to this group. References to them will be found in the name index to this volume.
GB5391571A 1970-11-30 1971-11-19 Synchronising random-character generators of a secure message transmission system Expired GB1499974A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702058796 DE2058796C3 (en) 1970-11-30 1970-11-30 Method and device for the synchronization of random character generators

Publications (1)

Publication Number Publication Date
GB1499974A true GB1499974A (en) 1978-02-01

Family

ID=5789481

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5391571A Expired GB1499974A (en) 1970-11-30 1971-11-19 Synchronising random-character generators of a secure message transmission system

Country Status (3)

Country Link
DE (1) DE2058796C3 (en)
FR (1) FR2431802A1 (en)
GB (1) GB1499974A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001035572A3 (en) * 1999-11-11 2001-11-22 Qualcomm Inc Method and apparatus for efficient irregular synchronization of a stream cipher
EP1324530A3 (en) * 2001-12-27 2003-11-12 Matsushita Electric Industrial Co., Ltd. Data transfer system using bit inversion
EP1565027A3 (en) * 1998-03-09 2007-12-26 QUALCOMM Incorporated Method for generating a broadcast challenge value

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6120442A (en) * 1984-07-09 1986-01-29 Toshiba Corp Chargeable broadcasting system
CN116545771B (en) * 2023-07-05 2023-09-15 上海伯镭智能科技有限公司 Intelligent storage method and system for intelligent driving system test data

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1565027A3 (en) * 1998-03-09 2007-12-26 QUALCOMM Incorporated Method for generating a broadcast challenge value
WO2001035572A3 (en) * 1999-11-11 2001-11-22 Qualcomm Inc Method and apparatus for efficient irregular synchronization of a stream cipher
US6909785B1 (en) 1999-11-11 2005-06-21 Qualcomm, Inc. Method and apparatus for efficient irregular synchronization of a stream cipher
EP1324530A3 (en) * 2001-12-27 2003-11-12 Matsushita Electric Industrial Co., Ltd. Data transfer system using bit inversion
US7260223B2 (en) 2001-12-27 2007-08-21 Matsushita Electric Industrial Co., Ltd. Data transfer system

Also Published As

Publication number Publication date
DE2058796C3 (en) 1979-04-05
FR2431802B1 (en) 1982-11-26
DE2058796A1 (en) 1978-01-12
DE2058796B2 (en) 1978-08-10
FR2431802A1 (en) 1980-02-15

Similar Documents

Publication Publication Date Title
BE832671A (en) HIGH-SPEED SOLENOID MAGNET USING MULTIPLE SPRINGS
MY7700056A (en) Cyclopropanecarboxylates, processes for producing them and compositions containing them
GB1499974A (en) Synchronising random-character generators of a secure message transmission system
ES394439A1 (en) Phase comparator
GB1312239A (en) Electrical circuit arrangements for converting a variable rate of pulse transmission into a related electrical output quantity
JPS5432091A (en) Radar interference eleimenating system
GB971468A (en) Improvements in or relating to calculating machines
JPS5437675A (en) Pulse count circuit
JPS539450A (en) Primary digital overall areas passing circuit
JPS53113435A (en) Memory unit
GB1312237A (en) Electrical circuit arrangements for converting a variable rate of input pulses into a related electrical output quantity
JPS53105351A (en) Signal generator
JPS5224517A (en) Channel processor
JPS525203A (en) Data transmission
GB1250048A (en) A process and system using a shift register
JPS5240907A (en) Die code signal transmission system
JPS51132725A (en) Multichannel selection forbidding system of operation-input
JPS5421108A (en) Judging method of most suited delivery speed of modem
JPS5337449A (en) Pulse transmission and reception system
JPS53138626A (en) Timing transmission system
JPS5313469A (en) Electronic timepiece
JPS52140246A (en) Information processing unit
JPS528712A (en) Speed changing system
ES402482A1 (en) Improvements in devodulation devices for coded messages. (Machine-translation by Google Translate, not legally binding)
JPS5289015A (en) Relay transmission at time dividing 2-lines type all communication

Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee