SE7605731L - PROCEDURE FOR DISTORTION OF NUMBER SIGNALS - Google Patents

PROCEDURE FOR DISTORTION OF NUMBER SIGNALS

Info

Publication number
SE7605731L
SE7605731L SE7605731A SE7605731A SE7605731L SE 7605731 L SE7605731 L SE 7605731L SE 7605731 A SE7605731 A SE 7605731A SE 7605731 A SE7605731 A SE 7605731A SE 7605731 L SE7605731 L SE 7605731L
Authority
SE
Sweden
Prior art keywords
carried out
transformed
encrypted
encryption
arrangement
Prior art date
Application number
SE7605731A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE409798B (en
Inventor
J Robra
P Rohm
G Kaminski
H Gruhl
Original Assignee
Tekade Felten & Guilleaume
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 Tekade Felten & Guilleaume filed Critical Tekade Felten & Guilleaume
Publication of SE7605731L publication Critical patent/SE7605731L/en
Publication of SE409798B publication Critical patent/SE409798B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Facsimile Transmission Control (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

In the method for encrypting analog speech signals with the aid of orthogonal matrices, the encrypted signals can be transmitted via a channel with restricted bandwidth. The encryption is carried out in a digital intermediate stage (ZV, S1, ZW1, ZW2, S2, M, ROM, A) in which digitised samples of the signal (E) to be encrypted are transformed using an orthogonal matrix. A specific re-arrangement of the order of the transformed samples and their subsequent transmission to the receiver as a continuous signal are carried out simultaneously. The matrix transformation and the aforementioned re-arrangement together represent an encryption method which is immune to synchronisation errors between samplings at the transmitting and receiving ends. <IMAGE>
SE7605731A 1975-05-30 1976-05-20 PROCEDURE FOR DISTORTION OF NUMBER SIGNALS SE409798B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2523828A DE2523828C2 (en) 1975-05-30 1975-05-30 Method for obfuscating speech signals with the aid of orthogonal matrices

Publications (2)

Publication Number Publication Date
SE7605731L true SE7605731L (en) 1976-12-01
SE409798B SE409798B (en) 1979-09-03

Family

ID=5947713

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7605731A SE409798B (en) 1975-05-30 1976-05-20 PROCEDURE FOR DISTORTION OF NUMBER SIGNALS

Country Status (11)

Country Link
AT (1) AT351603B (en)
AU (1) AU501272B2 (en)
BE (1) BE842316A (en)
CH (1) CH613575A5 (en)
DE (1) DE2523828C2 (en)
DK (1) DK139408C (en)
FR (1) FR2312895A1 (en)
GB (1) GB1522062A (en)
NL (1) NL171003C (en)
SE (1) SE409798B (en)
ZA (1) ZA763090B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811635A1 (en) * 1978-03-17 1979-09-20 Tekade Felten & Guilleaume PSEUDO-ACCESSIBLE PRODUCTION OF ORTHOGONAL MATRICES FOR ENCYCLING PURPOSES
CH649181A5 (en) * 1980-02-01 1985-04-30 Schweiz Eidgenossenschaft METHOD AND CIRCUIT FOR SECURED transmitting voice signals.
JP3724676B2 (en) * 1997-03-10 2005-12-07 ソニー株式会社 COMMUNICATION METHOD, TRANSMISSION DEVICE, AND RECEPTION DEVICE
JPH1168696A (en) * 1997-08-19 1999-03-09 Sony Corp Communication method, transmission equipment, reception equipment and cellular radio communication system
CN110489989A (en) * 2019-08-27 2019-11-22 深圳市道通智能航空技术有限公司 Data encrypting/de-encrypling method, its encryption/deciphering chip and its unmanned plane

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH232786A (en) * 1939-07-14 1944-06-15 Patelhold Patentverwertung Device for secret messaging.
CH237094A (en) * 1939-07-26 1945-03-31 Patelhold Patentverwertung Method and device for the transmission of messages to be kept secret.
BE455172A (en) * 1943-04-05
CH246844A (en) * 1945-09-15 1947-01-31 Patelhold Patentverwertung Method and device for obfuscating electrically transmitted voice messages.
FR1582036A (en) * 1968-03-15 1969-09-26

Also Published As

Publication number Publication date
FR2312895B1 (en) 1982-06-11
BE842316A (en) 1976-09-16
FR2312895A1 (en) 1976-12-24
DE2523828B1 (en) 1976-11-25
NL171003B (en) 1982-08-16
SE409798B (en) 1979-09-03
DK139408C (en) 1979-07-30
ATA391676A (en) 1979-01-15
AU1437276A (en) 1977-12-01
GB1522062A (en) 1978-08-23
DK139408B (en) 1979-02-12
NL7602959A (en) 1976-12-02
NL171003C (en) 1983-01-17
ZA763090B (en) 1978-01-25
AT351603B (en) 1979-08-10
DK155076A (en) 1976-12-01
AU501272B2 (en) 1979-06-14
DE2523828C2 (en) 1982-08-12
CH613575A5 (en) 1979-09-28

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