CH613575A5 - Method for encrypting analog speech signals with the aid of orthogonal matrices - Google Patents

Method for encrypting analog speech signals with the aid of orthogonal matrices

Info

Publication number
CH613575A5
CH613575A5 CH654276A CH654276A CH613575A5 CH 613575 A5 CH613575 A5 CH 613575A5 CH 654276 A CH654276 A CH 654276A CH 654276 A CH654276 A CH 654276A CH 613575 A5 CH613575 A5 CH 613575A5
Authority
CH
Switzerland
Prior art keywords
encrypting
aid
speech signals
analog speech
orthogonal matrices
Prior art date
Application number
CH654276A
Inventor
Joerg Robra
Peter Rohm
Gerhard Kaminski
Helmut 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 CH613575A5 publication Critical patent/CH613575A5/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)
CH654276A 1975-05-30 1976-05-24 Method for encrypting analog speech signals with the aid of orthogonal matrices CH613575A5 (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 (1)

Publication Number Publication Date
CH613575A5 true CH613575A5 (en) 1979-09-28

Family

ID=5947713

Family Applications (1)

Application Number Title Priority Date Filing Date
CH654276A CH613575A5 (en) 1975-05-30 1976-05-24 Method for encrypting analog speech signals with the aid of orthogonal matrices

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.
NL63459C (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
DK155076A (en) 1976-12-01
DE2523828B1 (en) 1976-11-25
FR2312895B1 (en) 1982-06-11
SE7605731L (en) 1976-12-01
ZA763090B (en) 1978-01-25
NL171003C (en) 1983-01-17
AT351603B (en) 1979-08-10
ATA391676A (en) 1979-01-15
AU1437276A (en) 1977-12-01
NL7602959A (en) 1976-12-02
NL171003B (en) 1982-08-16
DK139408C (en) 1979-07-30
GB1522062A (en) 1978-08-23
FR2312895A1 (en) 1976-12-24
DK139408B (en) 1979-02-12
DE2523828C2 (en) 1982-08-12
BE842316A (en) 1976-09-16
AU501272B2 (en) 1979-06-14
SE409798B (en) 1979-09-03

Similar Documents

Publication Publication Date Title
ZA761449B (en) Method for the preparation of alkylenecarbonates
GR60266B (en) Method for endothermic procedures
GB1547802A (en) Process for the preparation of poly-phenyleneterephthalamide
CS191961B2 (en) Method for the impregnation of active carbon
AU507677B2 (en) Shakeout apparatus
GB1517423A (en) Process for the preparation of diaryl-carbonates
JPS5285077A (en) Membrane apparatus
CA1020983A (en) Load-retaining apparatus
GB1537762A (en) System for the transmission of speech signals
ZA761609B (en) Method for the control of micro-organisms
PT65727B (en) Process for the preparation of 11-deoxyacetylenic aryl protaglandins
CH608786A5 (en) Process for the preparation of acetoacetylarylamides
AU502496B2 (en) Ion-nitriding apparatus
GB1534077A (en) Process for the preparation of 5-acetoacetylamino-benzimidazolone
JPS51122658A (en) Apparatus for producing point symmetrical body
JPS5280397A (en) Popymerization method of epsilonncaprolactam
CH613575A5 (en) Method for encrypting analog speech signals with the aid of orthogonal matrices
SU755180A3 (en) Membrane apparatus
GR58235B (en) Method for the preparation of diaryluutanolamines
CA1025675A (en) Tube-driving apparatus
GB1520330A (en) Process for the preparation of phospholene-1-oxides or su-lphides
SU657784A1 (en) Ear-separating apparatus
CA1001905A (en) Buoyancy apparatus
AU500920B2 (en) Sublimation apparatus
SU572269A1 (en) Method of preparing suppositories

Legal Events

Date Code Title Description
PL Patent ceased