CH238062A - Method and device for obscuring spoken messages. - Google Patents
Method and device for obscuring spoken messages.Info
- Publication number
- CH238062A CH238062A CH238062DA CH238062A CH 238062 A CH238062 A CH 238062A CH 238062D A CH238062D A CH 238062DA CH 238062 A CH238062 A CH 238062A
- Authority
- CH
- Switzerland
- Prior art keywords
- obscuring
- spoken messages
- spoken
- messages
- obscuring spoken
- Prior art date
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)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Complex Calculations (AREA)
- Collating Specific Patterns (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH588825X | 1943-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH238062A true CH238062A (en) | 1945-06-15 |
Family
ID=4521995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH238062D CH238062A (en) | 1943-06-23 | 1943-06-23 | Method and device for obscuring spoken messages. |
Country Status (4)
Country | Link |
---|---|
US (1) | US2411683A (en) |
CH (1) | CH238062A (en) |
FR (1) | FR904316A (en) |
GB (1) | GB588825A (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3979558A (en) * | 1944-06-30 | 1976-09-07 | Bell Telephone Laboratories, Incorporated | Signaling system |
CH246844A (en) * | 1945-09-15 | 1947-01-31 | Patelhold Patentverwertung | Method and device for obfuscating electrically transmitted voice messages. |
CH248975A (en) * | 1946-02-04 | 1947-05-31 | Patelhold Patentverwertung | Process and device for disguising the individual calls in a multi-channel system. |
US2923773A (en) * | 1953-10-27 | 1960-02-02 | Paul A Wagner | Electronic system for handling information |
US3024311A (en) * | 1957-01-29 | 1962-03-06 | Ampex | Signal system |
US3517313A (en) * | 1964-04-08 | 1970-06-23 | Joseph A Vasile | Amplitude elimination and restoration system |
US4020285A (en) * | 1972-09-29 | 1977-04-26 | Datotek, Inc. | Voice security method and system |
US3991271A (en) * | 1972-09-29 | 1976-11-09 | Datotek, Inc. | Voice security method and system |
US4195202A (en) * | 1978-01-03 | 1980-03-25 | Technical Communications Corporation | Voice privacy system with amplitude masking |
US4278840A (en) * | 1979-03-23 | 1981-07-14 | Datotek, Inc. | Dynamic frequency and time voice encryption system and method |
US4638357A (en) * | 1984-01-20 | 1987-01-20 | Home Box Office, Inc. | Audio scrambler |
US5101432A (en) * | 1986-03-17 | 1992-03-31 | Cardinal Encryption Systems Ltd. | Signal encryption |
JP2002261736A (en) * | 2001-02-27 | 2002-09-13 | Kepusutoramu:Kk | Signal scrambling/descrambling method and apparatus and privacy call method using the same |
EP1782562A4 (en) * | 2004-07-15 | 2011-09-14 | Essex Corp | A private and secure optical communication system using an optical tapped delay line |
-
1943
- 1943-06-23 CH CH238062D patent/CH238062A/en unknown
-
1944
- 1944-05-17 GB GB9468/44A patent/GB588825A/en not_active Expired
- 1944-05-17 FR FR904316D patent/FR904316A/en not_active Expired
- 1944-06-15 US US540517A patent/US2411683A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US2411683A (en) | 1946-11-26 |
FR904316A (en) | 1945-11-02 |
GB588825A (en) | 1947-06-04 |
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