GB2079109B - A system for enciphering and deciphering digital signals - Google Patents

A system for enciphering and deciphering digital signals

Info

Publication number
GB2079109B
GB2079109B GB8119018A GB8119018A GB2079109B GB 2079109 B GB2079109 B GB 2079109B GB 8119018 A GB8119018 A GB 8119018A GB 8119018 A GB8119018 A GB 8119018A GB 2079109 B GB2079109 B GB 2079109B
Authority
GB
United Kingdom
Prior art keywords
enciphering
digital signals
deciphering digital
deciphering
signals
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
GB8119018A
Other languages
English (en)
Other versions
GB2079109A (en
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.)
Oak Industries Inc
Original Assignee
Oak Industries Inc
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 Oak Industries Inc filed Critical Oak Industries Inc
Publication of GB2079109A publication Critical patent/GB2079109A/en
Application granted granted Critical
Publication of GB2079109B publication Critical patent/GB2079109B/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
    • H04L9/08—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
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H04L2209/601—Broadcast encryption

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Storage Device Security (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Circuits Of Receivers In General (AREA)
GB8119018A 1980-06-19 1981-06-19 A system for enciphering and deciphering digital signals Expired GB2079109B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16098580A 1980-06-19 1980-06-19

Publications (2)

Publication Number Publication Date
GB2079109A GB2079109A (en) 1982-01-13
GB2079109B true GB2079109B (en) 1984-04-11

Family

ID=22579317

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8119018A Expired GB2079109B (en) 1980-06-19 1981-06-19 A system for enciphering and deciphering digital signals

Country Status (11)

Country Link
JP (1) JPS5730438A (enrdf_load_stackoverflow)
AU (1) AU539774B2 (enrdf_load_stackoverflow)
BR (1) BR8103848A (enrdf_load_stackoverflow)
CA (1) CA1162623A (enrdf_load_stackoverflow)
DE (1) DE3124150C2 (enrdf_load_stackoverflow)
FR (1) FR2485305A1 (enrdf_load_stackoverflow)
GB (1) GB2079109B (enrdf_load_stackoverflow)
GR (1) GR74584B (enrdf_load_stackoverflow)
IL (1) IL63102A (enrdf_load_stackoverflow)
MX (1) MX150514A (enrdf_load_stackoverflow)
NL (1) NL8102940A (enrdf_load_stackoverflow)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1177558A (en) * 1982-04-15 1984-11-06 Groupe Videotron Ltee. (Le) Cable network data transmission system
US4531020A (en) * 1982-07-23 1985-07-23 Oak Industries Inc. Multi-layer encryption system for the broadcast of encrypted information
JPH0614641B2 (ja) * 1983-03-29 1994-02-23 富士通株式会社 鍵情報配送処理方式
JPS6032449A (ja) * 1983-08-01 1985-02-19 Matsushita Electric Ind Co Ltd 暗号化デジタル放送装置
EP0167442A3 (en) * 1984-06-29 1986-12-30 Fairchild Weston Systems Inc. Secure communication system
US4751732A (en) * 1984-07-06 1988-06-14 Kabushiki Kaisha Toshiba Broadcasting system
JPS6120442A (ja) * 1984-07-09 1986-01-29 Toshiba Corp 有料放送方式
DE3439120A1 (de) * 1984-10-25 1986-05-07 Philips Kommunikations Industrie AG, 8500 Nürnberg Verfahren zur identifizierung einer teilnehmerstation eines fernmeldenetzes
DE3501178A1 (de) * 1985-01-16 1986-07-17 Blaupunkt-Werke Gmbh, 3200 Hildesheim Verfahren und schaltungsanordnung zur verhinderung des unberechtigten empfangs verschluesselter fernsehsignale
JPH0685517B2 (ja) * 1985-06-28 1994-10-26 ソニー株式会社 情報サ−ビスシステム
US4866770A (en) * 1986-07-08 1989-09-12 Scientific Atlanta, Inc. Method and apparatus for communication of video, audio, teletext, and data to groups of decoders in a communication system
DE3715081A1 (de) * 1987-05-06 1988-11-17 Siemens Ag Verfahren zur verschluesselung von digitalen bildsignalen
DE3731532A1 (de) * 1987-09-18 1989-03-30 Siemens Ag Verfahren zur uebertragung von verschluesselten bildsignalen
DE3822354A1 (de) * 1988-07-01 1990-01-04 Siemens Ag Verfahren und anordnung zur verwuerfelung von bildsignalen
DE4419634A1 (de) * 1994-06-04 1995-12-07 Esd Vermoegensverwaltungsgesel Entschlüsselungseinrichtung von digitalen Informationen und Verfahren zur Durchführung der Ver- und Entschlüsselung dieser
DE4420970A1 (de) * 1994-06-16 1995-12-21 Esd Vermoegensverwaltungsgesel Entschlüsselungseinrichtung von Entschlüsselungsalgorithmen und Verfahren zur Durchführung der Ver- und Entschlüsselung derselben
DE4420967C2 (de) * 1994-06-16 2000-02-10 Esd Vermoegensverwaltungsgesel Entschlüsselungseinrichtung von digitalen Informationen und Verfahren zur Durchführung der Ver- und Entschlüsselung dieser mit Hilfe der Entschlüsselungseinrichtung
DE19619299A1 (de) * 1996-05-13 1997-12-18 Siemens Ag Schlüsselverteilung im FDDI-Übertragungsnetz
DE19649292A1 (de) * 1996-11-28 1998-06-04 Deutsche Telekom Ag Verfahren zum Sichern eines durch eine Schlüsselhierarchie geschützten Systems
GB2393367B (en) * 1999-04-16 2004-05-26 Fujitsu Ltd Optical line terminal
JP4201430B2 (ja) 1999-04-16 2008-12-24 富士通株式会社 光加入者線終端装置
GB2355819A (en) * 1999-10-26 2001-05-02 Marconi Comm Ltd Authentication of data and software
GB2367726B (en) * 2000-10-07 2003-04-23 Complementary Tech Ltd Communications with remote embedded applications

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH516854A (de) * 1969-11-29 1971-12-15 Ciba Geigy Ag Verfahren und Vorrichtung zur chiffrierten Übermittlung von Informationen
DE2706421C2 (de) * 1977-02-16 1979-03-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum Einstellen von Schlüsseltextgeneratoren in Chiffriergeräten
CH604432A5 (enrdf_load_stackoverflow) * 1977-03-16 1978-09-15 Europ Handelsges Anst

Also Published As

Publication number Publication date
GR74584B (enrdf_load_stackoverflow) 1984-06-29
MX150514A (es) 1984-05-16
IL63102A0 (en) 1981-09-13
FR2485305A1 (fr) 1981-12-24
JPS63976B2 (enrdf_load_stackoverflow) 1988-01-09
DE3124150C2 (de) 1985-03-28
DE3124150A1 (de) 1982-03-18
AU539774B2 (en) 1984-10-18
AU7187181A (en) 1981-12-24
IL63102A (en) 1984-03-30
GB2079109A (en) 1982-01-13
JPS5730438A (en) 1982-02-18
BR8103848A (pt) 1982-03-09
CA1162623A (en) 1984-02-21
NL8102940A (nl) 1982-01-18

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20010618