[go: up one dir, main page]

ES458856A1 - Procedimiento, con su correspondiente dispositivo, para ci- frar, respectivamente, informacion sonora. - Google Patents

Procedimiento, con su correspondiente dispositivo, para ci- frar, respectivamente, informacion sonora.

Info

Publication number
ES458856A1
ES458856A1 ES458856A ES458856A ES458856A1 ES 458856 A1 ES458856 A1 ES 458856A1 ES 458856 A ES458856 A ES 458856A ES 458856 A ES458856 A ES 458856A ES 458856 A1 ES458856 A1 ES 458856A1
Authority
ES
Spain
Prior art keywords
information channel
time
subdivided
sub
sections
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
ES458856A
Other languages
English (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.)
Anstalt Europaeische Handelsgesellschaft
Original Assignee
Anstalt Europaeische Handelsgesellschaft
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 Anstalt Europaeische Handelsgesellschaft filed Critical Anstalt Europaeische Handelsgesellschaft
Publication of ES458856A1 publication Critical patent/ES458856A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Reverberation, Karaoke And Other Acoustics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Document Processing Apparatus (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Storage Device Security (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

Procedimiento con su correspondiente dispositivo para cifrar y descifrar, respectivamente, información sonora, que está repartida en el eje de tiempo en bloques parciales que, de acuerdo con una información clave son cambiados entre sí, siendo repartidas las señales sonoras análogas entrantes en varias bandas de frecuencia de las que cada una determina un canal de información.
ES458856A 1976-06-01 1977-05-17 Procedimiento, con su correspondiente dispositivo, para ci- frar, respectivamente, informacion sonora. Expired ES458856A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH689376A CH607506A5 (es) 1976-06-01 1976-06-01

Publications (1)

Publication Number Publication Date
ES458856A1 true ES458856A1 (es) 1978-03-16

Family

ID=4316707

Family Applications (1)

Application Number Title Priority Date Filing Date
ES458856A Expired ES458856A1 (es) 1976-06-01 1977-05-17 Procedimiento, con su correspondiente dispositivo, para ci- frar, respectivamente, informacion sonora.

Country Status (19)

Country Link
US (1) US4149035A (es)
JP (1) JPS534401A (es)
AR (1) AR216465A1 (es)
AT (1) AT363129B (es)
BE (1) BE854626A (es)
BR (1) BR7703539A (es)
CA (1) CA1092195A (es)
CH (1) CH607506A5 (es)
DE (1) DE2723804C2 (es)
DK (1) DK239177A (es)
ES (1) ES458856A1 (es)
FI (1) FI771737A (es)
FR (1) FR2354005A1 (es)
GB (1) GB1567868A (es)
IT (1) IT1118027B (es)
NL (1) NL7705062A (es)
NO (1) NO144722C (es)
SE (1) SE416604B (es)
ZA (1) ZA773157B (es)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4221931A (en) * 1977-10-17 1980-09-09 Harris Corporation Time division multiplied speech scrambler
US4232194A (en) * 1979-03-16 1980-11-04 Ocean Technology, Inc. Voice encryption system
US4278840A (en) * 1979-03-23 1981-07-14 Datotek, Inc. Dynamic frequency and time voice encryption system and method
US4443660A (en) * 1980-02-04 1984-04-17 Rockwell International Corporation System and method for encrypting a voice signal
DE3138523A1 (de) * 1981-09-28 1983-04-07 Siemens AG, 1000 Berlin und 8000 München Verfahren zur abhoersicheren frequenzbandkomprimierten uebertragung von sprachsignalen
US4433211A (en) * 1981-11-04 1984-02-21 Technical Communications Corporation Privacy communication system employing time/frequency transformation
US4591673A (en) * 1982-05-10 1986-05-27 Lee Lin Shan Frequency or time domain speech scrambling technique and system which does not require any frame synchronization
US4551580A (en) * 1982-11-22 1985-11-05 At&T Bell Laboratories Time-frequency scrambler
US4763357A (en) * 1985-04-18 1988-08-09 Barr William S Method and apparatus for providing secure electronic communications
GB2182229B (en) * 1985-10-25 1989-10-04 Racal Res Ltd Speech scramblers
US4893339A (en) * 1986-09-03 1990-01-09 Motorola, Inc. Secure communication system
EP0313029A1 (de) * 1987-10-21 1989-04-26 Siemens Aktiengesellschaft Österreich Vorrichtung zur verschleierten Übertragung analoger Signale
US6061449A (en) * 1997-10-10 2000-05-09 General Instrument Corporation Secure processor with external memory using block chaining and block re-ordering
EP1615369A1 (fr) * 2004-07-06 2006-01-11 Proton World International N.V. Chiffrement par blocs du contenu d'une mémoire externe à un processeur
EP1617586B1 (fr) * 2004-07-06 2008-09-03 Proton World International N.V. Chiffrement en continu du contenu d'une mémoire externe à un processeur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH248975A (de) * 1946-02-04 1947-05-31 Patelhold Patentverwertung Verfahren und Einrichtung zur Verschleierung der einzelnen Gespräche einer Mehrkanalanlage.
US3696207A (en) * 1969-05-14 1972-10-03 Philips Corp System for the transmission of intelligence by means of scrambled audiosignals
CH518658A (de) * 1970-07-07 1972-01-31 Patelhold Patentverwaltungs Un Verfahren zur verschlüsselten Nachrichtenübermittlung durch zeitliche Vertauschung von Informationselementen
US3921151A (en) * 1971-06-21 1975-11-18 Patelhold Patentwerwertungs & Apparatus for enciphering transmitted data by interchanging signal elements of the transmitted data without overlapping or omitting any elements within the transmitted signal train
US3798360A (en) * 1971-06-30 1974-03-19 Ibm Step code ciphering system
US3991271A (en) * 1972-09-29 1976-11-09 Datotek, Inc. Voice security method and system

Also Published As

Publication number Publication date
AT363129B (de) 1981-07-10
SE416604B (sv) 1981-01-19
JPS534401A (en) 1978-01-17
CH607506A5 (es) 1978-12-29
DK239177A (da) 1977-12-02
NO144722B (no) 1981-07-13
BR7703539A (pt) 1978-03-14
GB1567868A (en) 1980-05-21
FR2354005A1 (fr) 1977-12-30
SE7706207L (sv) 1977-12-02
NL7705062A (nl) 1977-12-05
BE854626A (fr) 1977-11-14
NO771908L (no) 1977-12-02
FR2354005B3 (es) 1980-04-04
ATA350977A (de) 1980-12-15
US4149035A (en) 1979-04-10
ZA773157B (en) 1979-01-31
DE2723804A1 (de) 1977-12-15
DE2723804C2 (de) 1986-02-27
NO144722C (no) 1981-10-21
CA1092195A (en) 1980-12-23
AR216465A1 (es) 1979-12-28
IT1118027B (it) 1986-02-24
FI771737A (es) 1977-12-02

Similar Documents

Publication Publication Date Title
ES458856A1 (es) Procedimiento, con su correspondiente dispositivo, para ci- frar, respectivamente, informacion sonora.
GB1480858A (en) Enciphering
SE7714587L (sv) System for meddelanden
SE9503343D0 (sv) Metod för kryptering av information
ES449486A1 (es) Un sistema, con su dispositivo correspondiente, para detec- tar la presencia o ausencia de senal util en lineas telefo- nicas.
ES8606713A1 (es) Un metodo para codificar codigos de correccion de errores.
DE2861905D1 (en) A process for the verification of cryptographic operational keys used in data communication networks
GB2159020B (en) Methods of and apparatus for use in decoding digital data
DE3650444D1 (de) Verfahren und vorrichtung zur erzeugung von chiffrierten und dechiffrierten fernsehsignalen.
GB2065342A (en) Apparatus and method for processing of digital information
DE3072073D1 (en) Apparatus and method for hashing key data
ATE107822T1 (de) Verfahren für die digitale und/oder analoge codierung von information eines, zweier oder mehrerer kanäle und/oder frequenz- oder bandbreitenreduzierung und/oder erhöhung der übertragungssicherheit.
GB1102257A (en) Data processing arrangements
DE3063260D1 (en) Arrangement for encrypting and decrypting an analog signal by time compressions and expansions
FI901207A0 (fi) PCM-viestijärjestelmä
MY106831A (en) Synchronizing method in a mobile radio system.
DK420583A (da) Digitalt elektronisk skifteanlaeg
JPS5429504A (en) Simultaneous service system for audio and date communication
ZA806394B (en) Method of and apparatus for transmitting enciphered information
DK0568532T3 (da) Fremgangsmåde til transmission af digitaliserede, blokkodede lydsignaler under anvendelse af skalafaktorer
ES464227A1 (es) Procedimiento para la transmision velada de senales de tele-comunicacion.
JPS51145213A (en) Method of reducing distortion characteristics of video information
JPS57113655A (en) Signal encryption device
GB1418527A (en) Intelligible crosstalk protective system for time division switching centres
JPS5229741A (en) Method for recording image of recording means

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19991102