NO923945L - System for aa hindre en scrambler i aa generere uoenskede symboler - Google Patents

System for aa hindre en scrambler i aa generere uoenskede symboler

Info

Publication number
NO923945L
NO923945L NO92923945A NO923945A NO923945L NO 923945 L NO923945 L NO 923945L NO 92923945 A NO92923945 A NO 92923945A NO 923945 A NO923945 A NO 923945A NO 923945 L NO923945 L NO 923945L
Authority
NO
Norway
Prior art keywords
pct
characters
character
encoded
scrambler
Prior art date
Application number
NO92923945A
Other languages
English (en)
Other versions
NO923945D0 (no
NO304869B1 (no
Inventor
Paul Roger Febvre
Original Assignee
British Telecomm
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 British Telecomm filed Critical British Telecomm
Publication of NO923945D0 publication Critical patent/NO923945D0/no
Publication of NO923945L publication Critical patent/NO923945L/no
Publication of NO304869B1 publication Critical patent/NO304869B1/no

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
    • 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
    • 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
    • H04L9/36—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols with means for detecting characters not meant for transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Details Of Television Scanning (AREA)
  • Optical Communication System (AREA)
  • Noise Elimination (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Superheterodyne Receivers (AREA)
  • Dc Digital Transmission (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Eye Examination Apparatus (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Computer And Data Communications (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Burglar Alarm Systems (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Studio Circuits (AREA)
  • Surgical Instruments (AREA)
  • Endoscopes (AREA)
NO923945A 1990-04-12 1992-10-09 Kommunikasjonssystem, samt fremgangsmÕte for Õ overf°re datategn mellom en sender og en mottaker NO304869B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909008374A GB9008374D0 (en) 1990-04-12 1990-04-12 Communication system
PCT/GB1991/000579 WO1991016778A1 (en) 1990-04-12 1991-04-12 System to prevent a scrambler from generating undesired symbols

Publications (3)

Publication Number Publication Date
NO923945D0 NO923945D0 (no) 1992-10-09
NO923945L true NO923945L (no) 1992-12-09
NO304869B1 NO304869B1 (no) 1999-02-22

Family

ID=10674374

Family Applications (1)

Application Number Title Priority Date Filing Date
NO923945A NO304869B1 (no) 1990-04-12 1992-10-09 Kommunikasjonssystem, samt fremgangsmÕte for Õ overf°re datategn mellom en sender og en mottaker

Country Status (11)

Country Link
US (1) US5333197A (no)
EP (1) EP0524253B1 (no)
JP (1) JP2922643B2 (no)
AT (1) ATE154996T1 (no)
DE (1) DE69126702T2 (no)
DK (1) DK0524253T3 (no)
ES (1) ES2104701T3 (no)
GB (2) GB9008374D0 (no)
HK (2) HK1001114A1 (no)
NO (1) NO304869B1 (no)
WO (1) WO1991016778A1 (no)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5872822A (en) * 1995-10-26 1999-02-16 Mcdata Corporation Method and apparatus for memory sequencing
CN1229552A (zh) * 1997-04-30 1999-09-22 索尼公司 数字数据传输装置及方法
DE19815408C2 (de) * 1998-04-06 2002-06-20 Rohde & Schwarz Anordnung zum Optimieren der Datenübertragung eines gedächtnisbehafteten Funkkanals
US6233718B1 (en) * 1998-10-19 2001-05-15 Dolby Laboratories Licensing Corporation Avoiding forbidden data patterns in coded audio data
US7418098B1 (en) * 2000-11-27 2008-08-26 Protegrity Corporation Data type preserving encryption
EP1315065B1 (en) * 2001-11-23 2007-10-10 Protegrity Research & Development Method for intrusion detection in a database system
CN1328874C (zh) 2002-05-10 2007-07-25 索尼株式会社 用于传输数据的方法和装置
GB2430510B (en) * 2005-09-27 2011-05-25 Snell & Wilcox Ltd Improved scrambling
US8225106B2 (en) 2008-04-02 2012-07-17 Protegrity Corporation Differential encryption utilizing trust modes

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781472A (en) * 1971-04-15 1973-12-25 Datotek Digital data ciphering technique
US3886313A (en) * 1972-09-29 1975-05-27 Datotek Voice security method and system
US3868631A (en) * 1972-10-20 1975-02-25 Datotek Digital cryptographic system and method
US4079188A (en) * 1975-04-14 1978-03-14 Datotek, Inc. Multi-mode digital enciphering system
FR2439444A1 (fr) * 1978-10-18 1980-05-16 Lapeyronnie E Dispositif reversible de sur-codage pour la transmission confidentielle d'information pouvant etre imprimee
US4477912A (en) * 1982-02-12 1984-10-16 Arinc Research Corporation Correlation data communications system
DE3207040A1 (de) * 1982-02-26 1983-09-08 Siemens AG, 1000 Berlin und 8000 München Vefahren und anordnung zum uebertragen von zeichen
US4606056A (en) * 1985-02-04 1986-08-12 Burroughs Corporation Method of encoding and serially transmitting self-clocking data and control characters
DE3514860A1 (de) * 1985-04-25 1986-10-30 ANT Nachrichtentechnik GmbH, 7150 Backnang Verfahren zur bitweise verschluesselten uebertragung
US4771463A (en) * 1986-12-05 1988-09-13 Siemens Transmission Systems, Inc. Digital scrambling without error multiplication
US4811357A (en) * 1988-01-04 1989-03-07 Paradyne Corporation Secondary channel for digital modems using spread spectrum subliminal induced modulation
US5012489A (en) * 1988-11-07 1991-04-30 Hayes Microcomputer Products, Inc. Method for sending a plurality of data channels over a single communications line

Also Published As

Publication number Publication date
JP2922643B2 (ja) 1999-07-26
DK0524253T3 (da) 1998-02-16
HK133096A (en) 1996-08-02
ATE154996T1 (de) 1997-07-15
GB9221315D0 (en) 1992-12-02
NO923945D0 (no) 1992-10-09
JPH05506134A (ja) 1993-09-02
ES2104701T3 (es) 1997-10-16
GB2258373B (en) 1994-04-06
HK1001114A1 (en) 1998-05-22
US5333197A (en) 1994-07-26
DE69126702T2 (de) 1997-12-04
EP0524253B1 (en) 1997-07-02
GB9008374D0 (en) 1990-06-13
NO304869B1 (no) 1999-02-22
EP0524253A1 (en) 1993-01-27
GB2258373A (en) 1993-02-03
WO1991016778A1 (en) 1991-10-31
DE69126702D1 (de) 1997-08-07

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Legal Events

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MM1K Lapsed by not paying the annual fees

Free format text: LAPSED IN OCTOBER 2003