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HI A microdot is a text or image shrunk to prevent viewing by unintended recipients. A microdot is frequently shrunk to the size and shape of a typographical dot, such as a period or the tittle of a lowercase i or j. It is a technique of steganography. Microdot camera Mark IV - from http://www. ...
Microdot camera Mark IV - from http://www. ...
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A full stop or period (sometimes stop, full point or dot), is the punctuation mark commonly placed at the end of several different types of sentences in English and several other languages. ...
This article or section does not cite its references or sources. ...
Steganography is the art and science of writing hidden messages in such a way that no one apart from the intended recipient knows of the existence of the message; this is in contrast to cryptography, where the existence of the message itself is not disguised, but the content is obscured. ...
History In 1870 during the Franco-Prussian War, Paris was under siege. Messages were sent by carrier pigeon. A Parisian photographer named Dagron used a microfilm technique to enable each pigeon to carry a high volume of messages.[1] However, the images were not as small as microdots.[2] 1870 (MDCCCLXX) was a common year starting on Saturday (see link for calendar) of the Gregorian calendar or a common year starting on Monday of the 12-day-slower Julian calendar. ...
Combatants Second French Empire North German Confederation allied with south German states (later German Empire) Commanders Napoleon III Helmuth von Moltke Strength 500,000[citation needed] 550,000[citation needed] Casualties 150,000 dead or wounded 284,000 captured 350,000 civilian [citation needed] 100,000 dead or wounded 200...
City flag City coat of arms Motto: Fluctuat nec mergitur (Latin: Tossed by the waves, she does not sink) Coordinates Time Zone CET (GMT +1) Administration Country France Région Île-de-France Département Paris (75) Subdivisions 20 arrondissements Mayor Bertrand Delanoë (PS) (since 2001) City Statistics Land area...
A carrier pigeon is a breed of pigeon (specifically a domesticated Rock Dove, Columba livia) that has wattles, a nearly vertical stature, and that may once have been used to carry messages. ...
A microdot technique was used with steganographic purposes in Germany between World War I and World War II. It was later used by many countries to pass messages through insecure postal channels. Later microdot techniques used film with aniline dye, rather than silver halide layers, and were even harder for counter-espionage postal inspectors to find. A Professor Zapp in Germany is claimed to have been the inventor of the technique, and a WWII spy kit for microdot production was sometimes called a Zapp outfit. Steganography is the art and science of writing hidden messages in such a way that no one apart from the intended recipient knows of the existence of the message; this is in contrast to cryptography, where the existence of the message itself is not disguised, but the content is obscured. ...
Combatants Allied Powers: France Italy Russia Serbia United Kingdom United States Central Powers: Austria-Hungary Bulgaria Germany Ottoman Empire Commanders Ferdinand Foch Georges Clemenceau Victor Emmanuel III Luigi Cadorna Nicholas II Aleksei Brusilov Herbert Henry Asquith Douglas Haig John Jellicoe Woodrow Wilson John Pershing Wilhelm II Paul von Hindenburg Reinhard...
Combatants Major Allied powers: United Kingdom Soviet Union United States Republic of China and others Major Axis powers: Nazi Germany Italy Japan and others Commanders Winston Churchill Joseph Stalin Franklin Roosevelt Harry Truman Chiang Kai-Shek Adolf Hitler Benito Mussolini Hideki Tojo Casualties Military dead: 17,000,000 Civilian dead...
Aniline, phenylamine or aminobenzene (C6H5NH2) is an organic chemical compound which is a primary aromatic amine consisting of a benzene ring and an amino group. ...
A silver halide is one of the compounds formed between silver and one of the halogens, usually silver bromide (AgBr), silver chloride (AgCl) and silver iodide (AgI). ...
After the erection of the Berlin Wall, special cameras were used to generate microdots which were then adhered to letters and sent via normal means. Owing to the extremely small size of the microdot, these messages often went unnoticed by inspectors and information could then be read by the intended recipient using a microscope. East German construction workers building the Berlin Wall, 20 November 1961. ...
A microscope (Greek: micron = small and scopos = aim) is an instrument for viewing objects that are too small to be seen by the naked or unaided eye. ...
British mail censors sometimes referred to microdots as 'duff' since they were distributed here and there throughout letters rather like raisins in the British steamed suet pudding called plum duff. Spotted Dick and custard A can of Spotted Dick sponge pudding. ...
Modern usage
Microdot Identification Microdot identification is a process where tiny laser discs etched with the vehicle's VIN number are sprayed onto the car's major mechanical parts and under body areas. The technology was developed in Australia in 2001.
Since then, car manufacturers began using microdot identification. About 10,000 identifying numbers are sprayed on with a clear adhesive that cannot be seen by the human eye. This process, while quick and cost effective, deters car thieves who would have otherwise been able to rebirth vehicles as well as sell stolen vehicle parts as legitimate ones. Estimates of the cost to manufacturers of implementing the microdot technology vary between AUD $100 (USD $75)[3] and AUD $150[4] per vehicle. This cost is expected to drop as volume increases. Au. ...
The United States dollar is the official currency of the United States. ...
List of currently known manufacturers utilising microdot technology This list is incomplete; you can help by expanding it. Audi is a German automobile manufacturer with headquarters in Ingolstadt, Bavaria. ...
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The current FPV logo Ford Performance Vehicles (FPV) is the Melbourne-based official performance tuning division of Ford Australia, founded in 2002. ...
Holden Special Vehicles (usually abbreviated to HSV) is the officially designated performance vehicle division of Australian motor car manufacturer Holden. ...
Ralliart is the motorsports division of Mitsubishi Motors. ...
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Subaru - Wikipedia, the free encyclopedia /**/ @import /skins-1. ...
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Trivia A microdot was depicted in the the motion picture Mission Impossible 3. In the movie, the microdot was hidden at the back of postage stamp. Mission: Impossible III (abbreviated M:I-III) is the upcoming third film based on the television series Mission: Impossible. ...
See also Steganography is the art and science of writing hidden messages in such a way that no one apart from the intended recipient knows of the existence of the message; this is in contrast to cryptography, where the existence of the message itself is not disguised, but the content is obscured. ...
V-mail Envelope, April 1945 V-mail Letter Showing Censors Stamps V-mail was originally based on the British Airgraph, and was an unusual and ingenious system for delivering mail from United States troops to home addresses during World War II. It worked by photographing large amounts of censored mail...
This page aims to alphabetically list articles that are primarily related to cryptography. ...
Microprinting is one of many anti-counterfeiting techniques used most often on currency and bank checks, as well as various other items of value. ...
Printer steganography is a type of steganography produced by color printers, including HP and Xerox brand printers, where tiny yellow dots are added to each page. ...
References - White, William. The Microdot: History and Application. Williamstown, NJ: Phillips Publications, 1992.
- ^ Kipper, Gregory. Investigator's Guide to Steganography. Boca Raton: Auerbach Publications, 2003.
- ^ Hayhurst, J.D. The Pigeon Post into Paris 1870-1871. Privately published, 1970.
- ^ Auto theft drops as car makers fight back, Nassim Khadem, The Age, http://www.theage.com.au/articles/2004/03/27/1080330982083.html?from=storyrhs
- ^ FCAI throws microdot marking back to individual car-makers, Neil McDonald, goauto.com.au, http://www.gminsidenews.com/forums/showpost.php?s=cfcce00f942af1936a7e1096bd6d6074&p=277523&postcount=8
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