FR2467515B1 - - Google Patents

Info

Publication number
FR2467515B1
FR2467515B1 FR7925256A FR7925256A FR2467515B1 FR 2467515 B1 FR2467515 B1 FR 2467515B1 FR 7925256 A FR7925256 A FR 7925256A FR 7925256 A FR7925256 A FR 7925256A FR 2467515 B1 FR2467515 B1 FR 2467515B1
Authority
FR
France
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
FR7925256A
Other languages
French (fr)
Other versions
FR2467515A1 (fr
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.)
Telediffusion de France ets Public de Diffusion
Original Assignee
Telediffusion de France ets Public de Diffusion
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 Telediffusion de France ets Public de Diffusion filed Critical Telediffusion de France ets Public de Diffusion
Priority to FR7925256A priority Critical patent/FR2467515A1/fr
Priority to US06/241,068 priority patent/US4431865A/en
Priority to EP80401460A priority patent/EP0027423B1/fr
Priority to PCT/FR1980/000149 priority patent/WO1984004438A1/fr
Priority to DE8080401460T priority patent/DE3065543D1/de
Publication of FR2467515A1 publication Critical patent/FR2467515A1/fr
Application granted granted Critical
Publication of FR2467515B1 publication Critical patent/FR2467515B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H04N7/0888—Subscription systems therefor
    • 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
    • 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
    • H04L2209/125—Parallelization or pipelining, e.g. for accelerating processing of cryptographic operations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Storage Device Security (AREA)
  • Computer And Data Communications (AREA)
FR7925256A 1979-10-10 1979-10-10 Systeme de chiffrement et de dechiffrement d'un signal numerique Granted FR2467515A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR7925256A FR2467515A1 (fr) 1979-10-10 1979-10-10 Systeme de chiffrement et de dechiffrement d'un signal numerique
US06/241,068 US4431865A (en) 1979-10-10 1980-10-10 Digital signal enciphering and deciphering apparatus and system
EP80401460A EP0027423B1 (fr) 1979-10-10 1980-10-10 Installation de chiffrement et déchiffrement d'un signal numérique
PCT/FR1980/000149 WO1984004438A1 (fr) 1979-10-10 1980-10-10 Installation de chiffrement et dechiffrement d'un signal numerique
DE8080401460T DE3065543D1 (en) 1979-10-10 1980-10-10 Digital-signal ciphering and deciphering arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7925256A FR2467515A1 (fr) 1979-10-10 1979-10-10 Systeme de chiffrement et de dechiffrement d'un signal numerique

Publications (2)

Publication Number Publication Date
FR2467515A1 FR2467515A1 (fr) 1981-04-17
FR2467515B1 true FR2467515B1 (Direct) 1984-04-13

Family

ID=9230547

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7925256A Granted FR2467515A1 (fr) 1979-10-10 1979-10-10 Systeme de chiffrement et de dechiffrement d'un signal numerique

Country Status (5)

Country Link
US (1) US4431865A (Direct)
EP (1) EP0027423B1 (Direct)
DE (1) DE3065543D1 (Direct)
FR (1) FR2467515A1 (Direct)
WO (1) WO1984004438A1 (Direct)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH658759A5 (de) * 1983-05-20 1986-11-28 Gretag Ag Verfahren und vorrichtung zur chiffrierten datenuebermittlung.
US4596898A (en) * 1984-03-14 1986-06-24 Computer Security Systems, Inc. Method and apparatus for protecting stored and transmitted data from compromise or interception
SE447859B (sv) * 1984-12-10 1986-12-15 Datakonsult I Malmo Ab Krypteringsanordning samt dekrypteringsanordning
US4724541A (en) * 1985-07-24 1988-02-09 Mallick Brian C Data-dependent binary encoder/decoder
US4972481A (en) * 1986-06-09 1990-11-20 Datakonsult I Malmo Ab Ciphering and deciphering device
AU601370B2 (en) * 1986-06-09 1990-09-13 Datakonsult I Malmo Ab Ciphering and deciphering device
FR2601535B1 (fr) * 1986-07-11 1988-10-21 Bull Cp8 Procede pour certifier l'authenticite d'une donnee echangee entre deux dispositifs connectes en local ou a distance par une ligne de transmission
US4703503A (en) * 1986-10-03 1987-10-27 Hitohisa Asai Cryptographic system using pseudocomplements of vector Boolean algebra
FR2606232B1 (fr) * 1986-10-31 1988-12-02 Neiman Sa Procede de codage evolutif de haute securite et dispositif de mise en oeuvre de ce procede
US4997288A (en) * 1988-12-09 1991-03-05 The Exchange System Limited Partnership Power supply arrangement for fault-tolerant operation in a microcomputer-based encryption system
US5128996A (en) * 1988-12-09 1992-07-07 The Exchange System Limited Partnership Multichannel data encryption device
US5123047A (en) * 1988-12-09 1992-06-16 The Exchange System Limited Partnership Method of updating encryption device monitor code in a multichannel data encryption system
US4930139A (en) * 1989-05-31 1990-05-29 O'neill Communications, Inc. Spread spectrum communication system
US5454039A (en) * 1993-12-06 1995-09-26 International Business Machines Corporation Software-efficient pseudorandom function and the use thereof for encryption
US5778074A (en) * 1995-06-29 1998-07-07 Teledyne Industries, Inc. Methods for generating variable S-boxes from arbitrary keys of arbitrary length including methods which allow rapid key changes
US7290285B2 (en) * 2000-06-30 2007-10-30 Zinio Systems, Inc. Systems and methods for distributing and viewing electronic documents
JP4787434B2 (ja) * 2001-08-24 2011-10-05 富士通コンポーネント株式会社 暗号化方法、通信システム、データ入力装置
US7764792B1 (en) * 2005-01-13 2010-07-27 Marvell International Ltd. System and method for encoding data transmitted on a bus
GB2456683B (en) * 2006-09-07 2011-01-19 Fortress Gb Ltd A system and method to preclude message modification in data authentication systems through efficient use of feedback in cryptographic functions

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1393920A (en) * 1972-12-12 1975-05-14 Ibm Electric digital data processing systems
SE380696B (sv) * 1974-03-20 1975-11-10 Philips Svenska Ab Sett att alstra en pseudoslumpbitfoljd och anordning for utforande av settet.
DE2639806C2 (de) * 1976-09-03 1978-06-22 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren und Einrichtung zum Verschlüsseln oder Entschlüsseln von Datenblöcken in binärer Darstellung
US4133974A (en) * 1976-11-05 1979-01-09 Datotek, Inc. System for locally enciphering prime data
FR2448824A1 (fr) * 1979-02-06 1980-09-05 Telediffusion Fse Systeme de videotex muni de moyens de controle d'acces a l'information
FR2448825A1 (fr) * 1979-02-06 1980-09-05 Telediffusion Fse Systeme de transmission d'information entre un centre d'emission et des postes recepteurs, ce systeme etant muni d'un moyen de controle de l'acces a l'information transmise

Also Published As

Publication number Publication date
EP0027423A1 (fr) 1981-04-22
FR2467515A1 (fr) 1981-04-17
WO1984004438A1 (fr) 1984-11-08
US4431865A (en) 1984-02-14
DE3065543D1 (en) 1983-12-15
EP0027423B1 (fr) 1983-11-09

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Legal Events

Date Code Title Description
ST Notification of lapse