DE3360921D1 - Broadcasting encrypted signals - Google Patents

Broadcasting encrypted signals

Info

Publication number
DE3360921D1
DE3360921D1 DE8383302114T DE3360921T DE3360921D1 DE 3360921 D1 DE3360921 D1 DE 3360921D1 DE 8383302114 T DE8383302114 T DE 8383302114T DE 3360921 T DE3360921 T DE 3360921T DE 3360921 D1 DE3360921 D1 DE 3360921D1
Authority
DE
Germany
Prior art keywords
stream
initialisation
bit
words
register
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
DE8383302114T
Other languages
English (en)
Inventor
Stephen Charles Serpell
Charles Bile Brookson
John Asley Gordon
Graham Kenneth King
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10530099&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3360921(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by British Telecommunications PLC filed Critical British Telecommunications PLC
Application granted granted Critical
Publication of DE3360921D1 publication Critical patent/DE3360921D1/de
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
    • 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
    • H04L2209/12—Details relating to cryptographic hardware or logic circuitry
    • 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)
  • Time-Division Multiplex Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Burglar Alarm Systems (AREA)
  • Radio Transmission System (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
DE8383302114T 1982-04-30 1983-04-14 Broadcasting encrypted signals Expired DE3360921D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8212623 1982-04-30

Publications (1)

Publication Number Publication Date
DE3360921D1 true DE3360921D1 (en) 1985-11-07

Family

ID=10530099

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383302114T Expired DE3360921D1 (en) 1982-04-30 1983-04-14 Broadcasting encrypted signals

Country Status (5)

Country Link
EP (1) EP0093525B1 (de)
JP (1) JPS58202644A (de)
AT (1) ATE15964T1 (de)
CA (1) CA1209664A (de)
DE (1) DE3360921D1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1217755B (it) * 1988-06-01 1990-03-30 Sits Soc It Telecom Siemens Dispositivo di cifratura e decifratura per sistemi di trasmissione ad alta velocita,
US5444781A (en) * 1993-08-23 1995-08-22 Apple Computer Inc. Method and apparatus for decryption using cache storage
JPH10301492A (ja) 1997-04-23 1998-11-13 Sony Corp 暗号化装置および方法、復号装置および方法、並びに情報処理装置および方法
FI106514B (fi) * 1998-02-04 2001-02-15 Nokia Networks Oy Tiedonsiirto matkaviestinverkossa
US7277542B2 (en) 2000-09-25 2007-10-02 Broadcom Corporation Stream cipher encryption application accelerator and methods thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH402937A (de) * 1961-08-18 1965-11-30 Gretag Ag Verfahren zur Verschlüsselung von impulsförmig übertragenen Nachrichten
US4322576A (en) * 1979-12-28 1982-03-30 Racal-Milgo, Inc. Message format for secure communication over data links
US4418425A (en) * 1981-08-31 1983-11-29 Ibm Corporation Encryption using destination addresses in a TDMA satellite communications network
US4484027A (en) * 1981-11-19 1984-11-20 Communications Satellite Corporation Security system for SSTV encryption

Also Published As

Publication number Publication date
EP0093525B1 (de) 1985-10-02
ATE15964T1 (de) 1985-10-15
JPS58202644A (ja) 1983-11-25
CA1209664A (en) 1986-08-12
EP0093525A1 (de) 1983-11-09

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8331 Complete revocation