FR2103804A5 - - Google Patents
Info
- Publication number
- FR2103804A5 FR2103804A5 FR7127837A FR7127837A FR2103804A5 FR 2103804 A5 FR2103804 A5 FR 2103804A5 FR 7127837 A FR7127837 A FR 7127837A FR 7127837 A FR7127837 A FR 7127837A FR 2103804 A5 FR2103804 A5 FR 2103804A5
- Authority
- FR
- France
- 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
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)
- Synchronisation In Digital Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5965970A | 1970-07-30 | 1970-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2103804A5 true FR2103804A5 (fr) | 1972-04-14 |
Family
ID=22024396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7127837A Expired FR2103804A5 (fr) | 1970-07-30 | 1971-07-29 |
Country Status (6)
Country | Link |
---|---|
US (1) | US3723878A (fr) |
AU (1) | AU3179171A (fr) |
CA (1) | CA939843A (fr) |
DE (1) | DE2138228A1 (fr) |
FR (1) | FR2103804A5 (fr) |
IL (1) | IL37241A0 (fr) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2231737C1 (fr) * | 1972-06-29 | 1990-05-23 | Krupp Atlas Electronik Gmbh | |
US4013837A (en) * | 1972-09-29 | 1977-03-22 | Datotek, Inc. | Voice security method and system |
US3893031A (en) * | 1972-11-08 | 1975-07-01 | Boeing Co | Synchronization system for voice privacy unit |
US3909534A (en) * | 1973-09-07 | 1975-09-30 | Boeing Co | Voice privacy unit for intercommunication systems |
US4091423A (en) * | 1975-03-17 | 1978-05-23 | Datotek, Inc. | Synchronous digital data scrambling system |
US4169212A (en) * | 1975-04-14 | 1979-09-25 | Datotek, Inc. | Multi-mode digital enciphering system |
US4099027A (en) * | 1976-01-02 | 1978-07-04 | General Electric Company | Speech scrambler |
US4159399A (en) * | 1976-09-29 | 1979-06-26 | Tokyo Shibaura Electric Co., Ltd. | Security communication system using polarity inversion |
US4160875A (en) * | 1977-05-12 | 1979-07-10 | Kahn Leonard R | Security system |
US4188580A (en) * | 1977-10-20 | 1980-02-12 | Telesync Corporation | Secure communication system |
US4195202A (en) * | 1978-01-03 | 1980-03-25 | Technical Communications Corporation | Voice privacy system with amplitude masking |
JPS54129901A (en) * | 1978-03-31 | 1979-10-08 | Toshiba Corp | Secret communication system |
DE2854832C2 (de) * | 1978-12-19 | 1980-11-20 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Empfangsschaltung in einem störunterdrückenden Nachrichtenübertragungssystem mit schmalbandiger konventioneller Nachrichtenmodulation und zusätzlicher pseudozufalliger Phasensprungmodulation |
US4278840A (en) * | 1979-03-23 | 1981-07-14 | Datotek, Inc. | Dynamic frequency and time voice encryption system and method |
US4268720A (en) * | 1979-05-25 | 1981-05-19 | Gte Laboratories Incorporated | Scrambler speech transmission and synchronization system |
NZ199275A (en) * | 1980-12-16 | 1984-11-09 | Minnesota Mining Mfg Australia | Verification of recorded messages |
US4401854A (en) * | 1981-08-03 | 1983-08-30 | Bell Telephone Laboratories, Incorporated | Simultaneous transmission of an analog message signal and a digital data signal |
US4433211A (en) * | 1981-11-04 | 1984-02-21 | Technical Communications Corporation | Privacy communication system employing time/frequency transformation |
US4573205A (en) * | 1983-08-22 | 1986-02-25 | At&T Bell Laboratories | Technique for secure communications on FM radio channels |
DE3481887D1 (de) * | 1983-09-29 | 1990-05-10 | Nippon Telegraph & Telephone | Funkempfangssystem fuer ein phasenmoduliertes signal. |
DE3482363D1 (de) * | 1983-09-30 | 1990-06-28 | Nippon Telegraph & Telephone | Funksendesystem fuer ein phasenmoduliertes signal. |
US4638357A (en) * | 1984-01-20 | 1987-01-20 | Home Box Office, Inc. | Audio scrambler |
CA1252560A (fr) * | 1984-01-27 | 1989-04-11 | Frank T. Meriwether | Methode et systeme de brouillage de signaux |
EP1079372A4 (fr) * | 1999-03-03 | 2006-02-15 | Sony Corp | Dispositif d'enregistrement, procede d'enregistrement, dispositif de reproduction et procede de reproduction |
US7069590B1 (en) * | 2000-02-17 | 2006-06-27 | Microsoft Corporation | System and method for protecting data streams in hardware components |
US8792640B2 (en) | 2008-01-29 | 2014-07-29 | Sony Corporation | Systems and methods for securing a digital communications link |
CN101960847A (zh) * | 2008-04-11 | 2011-01-26 | 松下电器产业株式会社 | 发送装置及接收装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2479338A (en) * | 1945-01-13 | 1949-08-16 | Leonide E Gabrilovitch | Inverter and distorter for secret communications |
US2905747A (en) * | 1953-09-22 | 1959-09-22 | Rca Corp | Secrecy systems |
US3180927A (en) * | 1961-09-07 | 1965-04-27 | Itt | Cryptosecure transmission system |
US3341659A (en) * | 1964-01-24 | 1967-09-12 | Burroughs Corp | Controlled bandwidth coded voice communication system |
US3610828A (en) * | 1967-05-23 | 1971-10-05 | Technical Communications | Privacy communication system |
-
1970
- 1970-07-30 US US00059659A patent/US3723878A/en not_active Expired - Lifetime
-
1971
- 1971-07-06 IL IL37241A patent/IL37241A0/xx unknown
- 1971-07-29 AU AU31791/71A patent/AU3179171A/en not_active Expired
- 1971-07-29 FR FR7127837A patent/FR2103804A5/fr not_active Expired
- 1971-07-30 CA CA119,594A patent/CA939843A/en not_active Expired
- 1971-07-30 DE DE19712138228 patent/DE2138228A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
IL37241A0 (en) | 1971-11-29 |
US3723878A (en) | 1973-03-27 |
DE2138228A1 (de) | 1972-03-16 |
CA939843A (en) | 1974-01-08 |
AU3179171A (en) | 1973-02-01 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |