PT80644A - Encoder/descoder - Google Patents
Encoder/descoderInfo
- Publication number
- PT80644A PT80644A PT80644A PT8064485A PT80644A PT 80644 A PT80644 A PT 80644A PT 80644 A PT80644 A PT 80644A PT 8064485 A PT8064485 A PT 8064485A PT 80644 A PT80644 A PT 80644A
- Authority
- PT
- Portugal
- Prior art keywords
- descoder
- encoder
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
- G09C1/00—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
- G09C1/04—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system with sign carriers or indicators moved relative to one another to positions determined by a permutation code, or key, so as to indicate the appropriate corresponding clear or ciphered text
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Toys (AREA)
- Credit Cards Or The Like (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8415281 | 1984-06-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
PT80644A true PT80644A (en) | 1985-07-01 |
PT80644B PT80644B (en) | 1986-11-12 |
Family
ID=10562483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PT80644A PT80644B (en) | 1984-06-15 | 1985-06-14 | Encoder/descoder |
Country Status (10)
Country | Link |
---|---|
US (1) | US4972477A (pt) |
EP (1) | EP0185724A1 (pt) |
JP (1) | JPS61502427A (pt) |
CA (1) | CA1265109A (pt) |
ES (1) | ES296728Y (pt) |
GB (1) | GB2167891B (pt) |
IE (1) | IE56668B1 (pt) |
PT (1) | PT80644B (pt) |
WO (1) | WO1986000162A1 (pt) |
ZA (1) | ZA854457B (pt) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2196169A (en) * | 1986-10-13 | 1988-04-20 | Nicholas John Marshall Pelling | An encoding/decoding device |
US5024495A (en) * | 1990-04-20 | 1991-06-18 | Anderson David B | Computer software protection, by optical effects |
GB9123797D0 (en) * | 1991-11-08 | 1992-01-02 | Megaprint Group The Limited | Information-encrypting device and method |
DE19750779C1 (de) * | 1997-11-10 | 1999-01-14 | Deutsche Telekom Ag | Verfahren zum Identifizieren von Verrätern proprietärer Daten |
DE19847942A1 (de) * | 1998-04-03 | 2000-04-13 | Deutsche Telekom Ag | Verfahren zum Einbringen manipulationssicherer digitaler Fingerabdrücke in elektronische Dokumente |
DE19816356C2 (de) | 1998-04-03 | 2001-01-25 | Deutsche Telekom Ag | Verfahren zum Einbringen manipulationssicherer digitaler Fingerabdrücke in elektronische Dokumente |
ATE364963T1 (de) | 1998-10-09 | 2007-07-15 | Deutsche Telekom Ag | Verfahren zum einbringen und zur analyse von manipulationssicheren digitalen fingerabdrücken in elektronischen dokumenten |
US7406174B2 (en) * | 2003-10-21 | 2008-07-29 | Widevine Technologies, Inc. | System and method for n-dimensional encryption |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US387957A (en) * | 1888-08-14 | Piebbe bfigis mobeolsr aistd claude dueaistd | ||
GB222505A (en) * | 1923-09-28 | 1925-04-16 | Cryptograph Ab | Improved ciphering apparatus |
GB367528A (en) * | 1931-01-24 | 1932-02-25 | Jacob Smith Ross | Coding and decoding machine or cryptograph machine |
US2296312A (en) * | 1941-05-12 | 1942-09-22 | Edward J Sheehy | Variable authenticator |
US2668369A (en) * | 1951-03-13 | 1954-02-09 | Philip G Hilbert | Cipher device |
US2624958A (en) * | 1951-09-06 | 1953-01-13 | Fine Harry | Cryptogrammic device |
GB782249A (en) * | 1956-01-21 | 1957-09-04 | Meyer Horst | Improvements in or relating to playballs |
GB859046A (en) * | 1956-04-30 | 1961-01-18 | Zygmunt Stanislaw Piotrowski | Cipher apparatus |
US2941313A (en) * | 1958-05-09 | 1960-06-21 | Saul R Levin | Magnifying attachment for a world globe |
CH409474A (de) * | 1962-09-19 | 1966-03-15 | Europ Handelsges Anst | Chiffriertafel an einem mechanischen Chiffriergerät |
GB1523671A (en) * | 1976-12-09 | 1978-09-06 | Tilford B E L | Games and apparatus therefor |
US4107655A (en) * | 1977-01-10 | 1978-08-15 | Moorhouse John H | Mechanical code for operated device for access to coded electrical circuits |
US4373281A (en) * | 1978-01-19 | 1983-02-15 | Sebastian James A | Device for displaying indicia |
US4473228A (en) * | 1981-06-29 | 1984-09-25 | Hart John R | Three-dimensional combinatorial linkage |
US4415158A (en) * | 1981-09-21 | 1983-11-15 | General Symmetrics, Inc. | Puzzle |
US4599489A (en) * | 1984-02-22 | 1986-07-08 | Gordian Systems, Inc. | Solid state key for controlling access to computer software |
US4560164A (en) * | 1984-06-13 | 1985-12-24 | Darling Phillip H | Toy puzzle |
US4625967A (en) * | 1985-06-04 | 1986-12-02 | Yu Chin Lai | Movable surface global puzzle |
-
1985
- 1985-06-10 IE IE1442/85A patent/IE56668B1/xx unknown
- 1985-06-13 ZA ZA854457A patent/ZA854457B/xx unknown
- 1985-06-14 JP JP60502762A patent/JPS61502427A/ja active Pending
- 1985-06-14 ES ES1985296728U patent/ES296728Y/es not_active Expired
- 1985-06-14 CA CA000484016A patent/CA1265109A/en not_active Expired - Lifetime
- 1985-06-14 WO PCT/GB1985/000268 patent/WO1986000162A1/en not_active Application Discontinuation
- 1985-06-14 PT PT80644A patent/PT80644B/pt unknown
- 1985-06-14 EP EP85903025A patent/EP0185724A1/en not_active Withdrawn
- 1985-06-14 GB GB8515064A patent/GB2167891B/en not_active Expired
-
1988
- 1988-04-26 US US07/188,055 patent/US4972477A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0185724A1 (en) | 1986-07-02 |
WO1986000162A1 (en) | 1986-01-03 |
IE56668B1 (en) | 1991-10-23 |
ZA854457B (en) | 1986-02-26 |
CA1265109A (en) | 1990-01-30 |
JPS61502427A (ja) | 1986-10-23 |
GB2167891B (en) | 1989-05-24 |
PT80644B (en) | 1986-11-12 |
ES296728U (es) | 1988-03-01 |
US4972477A (en) | 1990-11-20 |
ES296728Y (es) | 1988-11-16 |
GB8515064D0 (en) | 1985-07-17 |
GB2167891A (en) | 1986-06-04 |
IE851442L (en) | 1985-12-15 |
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