Applied to on-line content the advertising model leads to similar problems like in the traditional media. Dependence on advertising revenue puts pressure on content providers to consider advertising interests. Nevertheless new difficulties caused by the technical structure of online media, missing legal regulation and not yet established ethical rules, appear.
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The advertising industry has always relied on media to transport their messages and disseminate them to the public. Depending on the product or service advertised and the audience targeted different media are used. Besides cinema and outdoor advertising (posters etc.) the huge majority of ads is placed within the classical media landscape, which includes TV, newspapers, magazines and radio.
Whereas in most cases only a relatively small fraction of advertising budgets is spent on cinema, outdoor and radio advertising, newspapers, magazines and TV account for more than two thirds of the money spent on ads. Still with the growing popularity of new media advertisers and marketers have recently also discovered digital networks and especially the Internet for their purposes.
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1913 the wheel cipher gets re-invented as a strip
1917
- an AT&T-employee, Gilbert S. Vernam, invents a polyalphabetic cipher machine that works with random-keys
1918 the Germans start using the ADFGVX-system, that later gets later by the French Georges Painvin
- Arthur Scherbius patents a ciphering machine and tries to sell it to the German Military, but is rejected
1919 Hugo Alexander Koch invents a rotor cipher machine
1921 the Hebern Electric Code, a company producing electro-mechanical cipher machines, is founded
1923 Arthur Scherbius founds an enterprise to construct and finally sell his
late 1920's/30's more and more it is criminals who use cryptology for their purposes (e.g. for smuggling). Elizabeth Smith Friedman deciphers the codes of rum-smugglers during prohibition regularly
1929 Lester S. Hill publishes his book Cryptography in an Algebraic Alphabet, which contains enciphered parts
1933-1945 the Germans make the Enigma machine its cryptographic main-tool, which is broken by the Poles Marian Rejewski, Gordon Welchman and Alan Turing's team at Bletchley Park in England in 1939
1937 the Japanese invent their so called Purple machine with the help of Herbert O. Yardley. The machine works with telephone stepping relays. It is broken by a team of
1930's the Sigaba machine is invented in the USA, either by W.F. Friedman or his colleague Frank Rowlett
- at the same time the British develop the Typex machine, similar to the German Enigma machine
1943 Colossus, a code breaking computer is put into action at Bletchley Park
1943-1980 the cryptographic Venona Project, done by the NSA, is taking place for a longer period than any other program of that type
1948 Shannon, one of the first modern cryptographers bringing mathematics into cryptography, publishes his book A Communications Theory of Secrecy Systems
1960's the Communications-Electronics Security Group (= CESG) is founded as a section of Government Communications Headquarters (= GCHQ)
late 1960's the IBM Watson Research Lab develops the Lucifer cipher
1969 James Ellis develops a system of separate public-keys and private-keys
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American corporation founded in 1892 and today engaged primarily in the manufacture and sale of syrup and concentrate for Coca-Cola, a sweetened, carbonated beverage that is a cultural institution in the United States and a symbol around the world of American tastes. The company also produces and sells other soft drinks and citrus beverages. Corporate headquarters are in Atlanta, Ga. The post-World War II years saw diversification in the packaging of Coca-Cola and also in the development or acquisition of new products. In 1946 the company purchased rights to the Fanta soft drink, previously developed in Germany. It introduced the lemon-lime drink Sprite in 1961 and the sugar-free cola Tab in 1963. By purchase of Minute Maid Corporation in 1960, it entered the citrus beverage market. In 1982 the company acquired a controlling interest in Columbia Pictures, a motion picture and entertainment company, but sold its interest to Sony Corporation in 1989.
the original, legible text
the study of breaking others' codes to transform a message back into a legible form without knowing the key from the beginning