CA1205540A - Communications scrambling systems - Google Patents

Communications scrambling systems

Info

Publication number: CA1205540A
Authority: CA; Canada
Prior art keywords: analogue; signals; stores; coded; reorganisation
Prior art date: 1982-06-02
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

CA000429393A

Other languages

English (en)

French (fr)

Inventor

Kenneth Austin

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.)

Plessey Co Ltd

Original Assignee

Plessey Co Ltd

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.)

1982-06-02

Filing date

1983-06-01

Publication date

1986-06-03

1983-06-01 Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd

1986-06-03 Application granted granted Critical

1986-06-03 Publication of CA1205540A publication Critical patent/CA1205540A/en

Status Expired legal-status Critical Current

Links

238000004891 communication Methods 0.000 title claims abstract description 14
230000006854 communication Effects 0.000 title claims abstract description 14
230000005540 biological transmission Effects 0.000 claims abstract description 9
230000011664 signaling Effects 0.000 claims abstract description 3
230000015654 memory Effects 0.000 claims description 31
125000004122 cyclic group Chemical group 0.000 claims description 6
238000000034 method Methods 0.000 claims description 6
238000006243 chemical reaction Methods 0.000 claims 6
230000001360 synchronised effect Effects 0.000 abstract description 2
230000000875 corresponding effect Effects 0.000 description 5
230000000694 effects Effects 0.000 description 3
238000005070 sampling Methods 0.000 description 3
230000000295 complement effect Effects 0.000 description 2
JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
230000003252 repetitive effect Effects 0.000 description 2
USNBCAPIYYPNGO-UHFFFAOYSA-N Decodine Natural products C12=C(O)C(OC)=CC=C2C(N2CCCCC2C2)CC2OC(=O)CCC2=CC=C(O)C1=C2 USNBCAPIYYPNGO-UHFFFAOYSA-N 0.000 description 1
DIWRORZWFLOCLC-UHFFFAOYSA-N Lorazepam Chemical compound C12=CC(Cl)=CC=C2NC(=O)C(O)N=C1C1=CC=CC=C1Cl DIWRORZWFLOCLC-UHFFFAOYSA-N 0.000 description 1
238000009825 accumulation Methods 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
230000001276 controlling effect Effects 0.000 description 1
238000013479 data entry Methods 0.000 description 1
238000010586 diagram Methods 0.000 description 1
239000003607 modifier Substances 0.000 description 1
230000004044 response Effects 0.000 description 1
230000005236 sound signal Effects 0.000 description 1
230000001131 transforming effect Effects 0.000 description 1
230000001960 triggered effect Effects 0.000 description 1

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/06—Secret communication by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Mobile Radio Communication Systems (AREA)

CA000429393A 1982-06-02 1983-06-01 Communications scrambling systems Expired CA1205540A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB8216137		1982-06-02
GB8216137		1982-06-02

Publications (1)

Publication Number	Publication Date
CA1205540A true CA1205540A (en)	1986-06-03

Family

ID=10530811

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA000429393A Expired CA1205540A (en)	1982-06-02	1983-06-01	Communications scrambling systems

Country Status (2)

Country	Link
EP (1)	EP0095923A3 (de)
CA (1)	CA1205540A (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2151886A (en) *	1983-12-21	1985-07-24	British Broadcasting Corp	Conditional-access broadcast transmission
CA2162125C (en) *	1993-05-05	2005-09-20	Sagetech Inc.	A repertoire of mappings for a cryptosystem
DE69322376T2 (de) *	1993-05-05	1999-05-06	Zunquan San Diego Calif. Liu	Einrichtung und Verfahren zur Datenverschlüsselung
GB2288519A (en) *	1994-04-05	1995-10-18	Ibm	Data encryption
DE4425158C2 (de) *	1994-07-16	2003-07-03	Deutsche Telekom Ag	Verfahren und Anordnung zur Realisierung von kryptologischen Funktionen
GB2386041A (en) *	2002-03-01	2003-09-03	Sensaura Ltd	A method of modifying intermittent audio signals such as speech or musical notes in real time
FR2837644A1 (fr) *	2002-10-25	2003-09-26	Canal Plus Technologies	Procede de transmission securisee de messages ou de donnees entre deux entites
US20060222186A1 (en) *	2005-04-05	2006-10-05	Paige Robert F	Multi-channel audio switch
ITRM20070010A1 (it) *	2007-01-09	2008-07-10	Telecomponenti S R L	Metodo di elaborazione di un segnale digitale e sistema utilizzante tale metodo.
FR2927493B1 (fr) *	2008-02-08	2010-06-11	Philippe Thorel	Procede et systeme de securisation de diffusion de donnees

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2307441C1 (de) *	1973-02-15	1975-05-07	Licentia Gmbh	Verfahren zum Verschleiern von Sprachsignalen
FR2379947A1 (fr) *	1977-02-03	1978-09-01	Secre	Procede et dispositif de brouillage permettant la discretion dans la transmission d'informations
US4229817A (en) *	1978-04-28	1980-10-21	Datotek, Inc.	Portable electronic cryptographic device
US4433211A (en) *	1981-11-04	1984-02-21	Technical Communications Corporation	Privacy communication system employing time/frequency transformation

1983
- 1983-05-31 EP EP83303100A patent/EP0095923A3/de not_active Withdrawn
- 1983-06-01 CA CA000429393A patent/CA1205540A/en not_active Expired

Also Published As

Publication number	Publication date
EP0095923A2 (de)	1983-12-07
EP0095923A3 (de)	1985-08-21

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Legal Events

Date	Code	Title	Description
2003-06-03	MKEX	Expiry