AU539774B2 - Two level key coding - Google Patents

Two level key coding

Info

Publication number
AU539774B2
AU539774B2 AU71871/81A AU7187181A AU539774B2 AU 539774 B2 AU539774 B2 AU 539774B2 AU 71871/81 A AU71871/81 A AU 71871/81A AU 7187181 A AU7187181 A AU 7187181A AU 539774 B2 AU539774 B2 AU 539774B2
Authority
AU
Australia
Prior art keywords
level key
key coding
coding
level
key
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.)
Ceased
Application number
AU71871/81A
Other languages
English (en)
Other versions
AU7187181A (en
Inventor
Leo I. Bluestein
Paul Ed Crandell
David A. Drake
Leo Jedynak
Larry W. Simpson
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 AU7187181A publication Critical patent/AU7187181A/en
Application granted granted Critical
Publication of AU539774B2 publication Critical patent/AU539774B2/en
Anticipated expiration legal-status Critical
Ceased 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)
  • Circuits Of Receivers In General (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
AU71871/81A 1980-06-19 1981-06-16 Two level key coding Ceased AU539774B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16098580A 1980-06-19 1980-06-19
US160985 1980-06-19

Publications (2)

Publication Number Publication Date
AU7187181A AU7187181A (en) 1981-12-24
AU539774B2 true AU539774B2 (en) 1984-10-18

Family

ID=22579317

Family Applications (1)

Application Number Title Priority Date Filing Date
AU71871/81A Ceased AU539774B2 (en) 1980-06-19 1981-06-16 Two level key coding

Country Status (11)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU599035B2 (en) * 1985-06-28 1990-07-12 Sony Corporation Data transmission system
AU606354B2 (en) * 1986-08-14 1991-02-07 Scientific-Atlanta, Inc. Method and apparatus for communication of video, audio, teletext, and data to groups of decoders in a communication system

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1177558A (fr) * 1982-04-15 1984-11-06 Groupe Videotron Ltee. (Le) Systeme de transmission de donnees par reseau cable
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 (fr) * 1984-06-29 1986-12-30 Fairchild Weston Systems Inc. Système de communication à sécurité
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
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
JP4201430B2 (ja) 1999-04-16 2008-12-24 富士通株式会社 光加入者線終端装置
GB2393367B (en) * 1999-04-16 2004-05-26 Fujitsu Ltd Optical line terminal
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 (fr) * 1977-03-16 1978-09-15 Europ Handelsges Anst

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU599035B2 (en) * 1985-06-28 1990-07-12 Sony Corporation Data transmission system
AU606354B2 (en) * 1986-08-14 1991-02-07 Scientific-Atlanta, Inc. Method and apparatus for communication of video, audio, teletext, and data to groups of decoders in a communication system

Also Published As

Publication number Publication date
GB2079109B (en) 1984-04-11
FR2485305A1 (fr) 1981-12-24
JPS5730438A (en) 1982-02-18
GR74584B (fr) 1984-06-29
CA1162623A (fr) 1984-02-21
JPS63976B2 (fr) 1988-01-09
MX150514A (es) 1984-05-16
IL63102A (en) 1984-03-30
DE3124150A1 (de) 1982-03-18
DE3124150C2 (de) 1985-03-28
IL63102A0 (en) 1981-09-13
GB2079109A (en) 1982-01-13
BR8103848A (pt) 1982-03-09
NL8102940A (nl) 1982-01-18
AU7187181A (en) 1981-12-24

Similar Documents

Publication Publication Date Title
AU539774B2 (en) Two level key coding
AU547117B2 (en) Key
AU542145B2 (en) make
AU549017B2 (en) Redefine key
JPS5774325A (en) Elastomeric polyurethane-polyurea polymer
AU537193B2 (en) Inorganic foams
AU541995B2 (en) m
AU7963382A (en) Handcuffs
AU3206284A (en) 2-guanidno-4-heteroarylthiazoles
AU543567B2 (en) Twist lock
AU540603B2 (en) Modified polyether
AU537124B2 (en) Tumbler switch
AU527275B2 (en) Auto-diaphragm hemodialyser
JPS5793718A (en) Key assembly
AU555476B2 (en) Binary encoding
AU539565B2 (en) If amilifier
AU7596781A (en) Pushbutton key arrangement
AU517843B2 (en) Guanylamidines
AU543872B2 (en) Lock
AU525004B2 (en) Phthalimidoguanidines
GB2089883B (en) Keys
AU543204B2 (en) Key storage unit
JPS5793719A (en) Key assembly
AU544220B2 (en) up
AU526844B2 (en) Surf-ski