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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The advertising industry is dominated by three huge advertising networks, which offer their services throughout the world. Gross income of the three leading agencies is twice as much, as the one of places four to ten.
Table: World's Top 10 Advertising Organizations 1999
(figures in millions of U.S. dollars)
|
Table: Top 10 Global Marketers 1998
(figures in millions of U.S. dollars)
|
On the other hand the three biggest advertisers only spend about US$ 2 millions less than places four to ten together. Whereas money spent on advertising in traditional media comes from very diverse categories, companies offering computer hard- and software, peripherals or Internet services mainly pay for on-line advertisements.
Table: Top 10 Internet Advertisers 1998
(figures in millions of U.S. dollars)
|
Source: Advertising Age
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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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DARPA (Defense Advanced Research Projects Agency) is the independent research branch of the U.S. Department of Defense that, among its other accomplishments, funded a project that in time was to lead to the creation of the Internet. Originally called ARPA (the "D" was added to its name later), DARPA came into being in 1958 as a reaction to the success of Sputnik, Russia's first manned satellite. DARPA's explicit mission was (and still is) to think independently of the rest of the military and to respond quickly and innovatively to national defense challenges.
In the late 1960s, DARPA provided funds and oversight for a project aimed at interconnecting computers at four university research sites. By 1972, this initial network, now called the
http://www.darpa.mil
Being the worldwide leader in networking for the Internet, Cisco Systems is one of the most prominent companies of the Internet industry.
http://www.cisco.com
Headquartered in San Jose, USA, AboveNet Communications is a
http://www.above.net
b. July 1, 1646, Leipzig
d. November 14, 1716, Hannover, Hanover
German philosopher, mathematician, and political adviser, important both as a metaphysician and as a logician and distinguished also for his independent invention of the differential and integral calculus. 1661, he entered the University of Leipzig as a law student; there he came into contact with the thought of men who had revolutionized science and philosophy--men such as