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 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
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 (en)
AU (1) AU539774B2 (en)
BR (1) BR8103848A (en)
CA (1) CA1162623A (en)
DE (1) DE3124150C2 (en)
FR (1) FR2485305A1 (en)
GB (1) GB2079109B (en)
GR (1) GR74584B (en)
IL (1) IL63102A (en)
MX (1) MX150514A (en)
NL (1) NL8102940A (en)

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 (en) * 1983-03-29 1994-02-23 富士通株式会社 Key information delivery processing method
JPS6032449A (en) * 1983-08-01 1985-02-19 Matsushita Electric Ind Co Ltd Ciphered digital broadcast equipment
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 (en) * 1984-07-09 1986-01-29 Toshiba Corp Chargeable broadcasting system
DE3439120A1 (en) * 1984-10-25 1986-05-07 Philips Kommunikations Industrie AG, 8500 Nürnberg Method for identifying a subscriber station of a telecommunications network
DE3501178A1 (en) * 1985-01-16 1986-07-17 Blaupunkt-Werke Gmbh, 3200 Hildesheim METHOD AND CIRCUIT ARRANGEMENT FOR PREVENTING THE UNAUTHORIZED RECEPTION OF ENCRYPTED TELEVISION SIGNALS
JPH0685517B2 (en) * 1985-06-28 1994-10-26 ソニー株式会社 Information service system
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 (en) * 1987-05-06 1988-11-17 Siemens Ag Method for encrypting digital video signals
DE3731532A1 (en) * 1987-09-18 1989-03-30 Siemens Ag Process for transmitting encoded picture signals
DE3822354A1 (en) * 1988-07-01 1990-01-04 Siemens Ag Method and arrangement for scrambling image signals
DE4419634A1 (en) * 1994-06-04 1995-12-07 Esd Vermoegensverwaltungsgesel Decryption device for digital information and method for performing the encryption and decryption of this
DE4420967C2 (en) * 1994-06-16 2000-02-10 Esd Vermoegensverwaltungsgesel Decryption device for digital information and method for carrying out the encryption and decryption of this using the decryption device
DE4420970A1 (en) * 1994-06-16 1995-12-21 Esd Vermoegensverwaltungsgesel Decryption device for decryption algorithms and method for performing the encryption and decryption thereof
DE19619299A1 (en) * 1996-05-13 1997-12-18 Siemens Ag Code key distribution method in fibre distributed data interface (FDDI) transmission network
DE19649292A1 (en) * 1996-11-28 1998-06-04 Deutsche Telekom Ag Access protection method for pay television
GB2393367B (en) * 1999-04-16 2004-05-26 Fujitsu Ltd Optical line terminal
JP4201430B2 (en) 1999-04-16 2008-12-24 富士通株式会社 Optical subscriber line termination equipment
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 (en) * 1969-11-29 1971-12-15 Ciba Geigy Ag Method and device for encrypted transmission of information
DE2706421C2 (en) * 1977-02-16 1979-03-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Procedure for setting ciphertext generators in encryption devices
CH604432A5 (en) * 1977-03-16 1978-09-15 Europ Handelsges Anst

Also Published As

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

Similar Documents

Publication Publication Date Title
GB2079109B (en) A system for enciphering and deciphering digital signals
JPS55143883A (en) Scramble for television voice signal and scramble eliminating system
GB2066629B (en) Methods and apparatus for encoding digital signals
AU536328B2 (en) Digital audio scrambler system in a television carrier
DE3070681D1 (en) Enciphering and deciphering system
DE3368168D1 (en) Method for encrypting a line-scanned television signal and encrypting and decrypting apparatus
ZA81781B (en) Digital systems
GB2063598B (en) Methods and apparatuses for encoding a digital signal
JPS57111812A (en) Transmitting system for digital information
JPS56149854A (en) Digital transmission system
JPS53136404A (en) Digital audio protecting system and method
GB2041701B (en) Digital signal receiver system
JPS5757056A (en) Method and device for synchronizing digital signal
IL62566A0 (en) Digital data transmission system
ZA815231B (en) Digital signal transmitting system
DE3064511D1 (en) Digital signal transmission system
JPS55159688A (en) Digital signal communication system
GB2049360B (en) Digital signal processing system
DE3361090D1 (en) Digital signal communication system
JPS57145415A (en) Method and device for altering digital signal
GB8710382D0 (en) Digital signal encryption
DE3072018D1 (en) System for the distribution of digital signals
JPS5761358A (en) Digital signal synchronizing system
EP0178608A3 (en) Cryptographic digital signal tranceiver method and apparatus
GB2052818B (en) Digital information transmission system

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