0 - 1400 A.D. 150 A smoke signals network covers the Roman Empire The Roman smoke signals network consisted of towers within a visible range of each other and had a total length of about 4500 kilometers. It was used for military signaling. For a similar telegraph network in ancient Greece see Aeneas Tacitus' optical communication system. About 750 In Japan block printing is used for the first time. 868 In China the world's first dated book, the Diamond Sutra, is printed. 1041-1048 In China moveable types made from clay are invented. 1088 First European medieval university is established in Bologna. The first of the great medieval universities was established in Bologna. At the beginning universities predominantly offered a kind of do-it-yourself publishing service. Books still had to be copied by hand and were so rare that a copy of a widely desired book qualified for being invited to a university. Holding a lecture equaled to reading a book aloud, like a priest read from the Bible during services. Attending a lecture equaled to copy a lecture word by word, so that you had your own copy of a book, thus enabling you to hold a lecture, too. For further details see History of the Idea of a University, http://quarles.unbc.edu/ideas/net/history/history.html

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Extract of AOL Time Warner’s Content Production and Distribution Holdings The following selection does not claim to present an exhaustive listing, but rather picks some of the company's most important assets. Due to the rapid developments in the world of media giants the list is also subject to changes. Cable TV Systems and Channels/Networks Time Warner Cable has 12.6 million subscribers in the U.S. and also runs 5 local 24-hour news stations. Cable TV channels/networks (some part-owned): HBO, HBO Plus, HBO Signature, HBO Family, HBO Comedy, HBO Zone, Cinemax, MoreMAX, ActionMAX, ThrillerMAX, HBO en Espa-ol, Comedy Central, Court TV, HBO Ole, HBO Asia, HBO Central Europe, CNN, CNN Headline News, CNN International, CNNfN, CNN/Sports Illustrated, CNN en Espa-ol, CNN Airport Network, CNN Radio, CNN Radio Noticias, CNN Interactive TBS Superstation, Turner Network Television, Cartoon Network, Turner Classic Movies, TNT Europe, Cartoon Network Europe, TNT Latin America, Cartoon Network Latin America, TNT & Cartoon Network/Asia Pacific, CNN+, n-tv Movies, TV, Video Production, and Movie Theaters Warner Bros. film studio Warner Bros. Television production studios Warner Bros. Home Video Turner worldwide Home Video Turner Pictures Castle Rock Entertainment movie production company New Line Cinema movie production company Warner Bros. film library Turner Film Library Hanna Barbera Cartoons Owns many movie houses, with over 1,000 screens, around the world Book Publishing Time Life Inc. Book-of-the-Month Club Warner Books Little, Brown and Company Oxmoor House Leisure Arts Sunset Books Magazines Time, People, Sports Illustrated, Fortune, Life, Money, Parenting, In Style, Entertainment Weekly, Cooking Light, Baby Talk, First Moments, Coastal Living, Health, Progressive Farmer, Southern Accents, Southern Living, Sports Illustrated, For Kids, Sunset, Teen People, Time for Kids, Weight Watchers, Mutual Funds, Your Company, Asiaweek, President, Wallpaper. Hippocrates Recorded Music Warner Music Group The Atlantic Group Elektra Entertainment Group Rhino Entertainment Sire Records Group Warner Bros. Records Warner Music International WEA Inc. WEA Corp. WEA Manufacturing Ivy Hill Corp. Warner Special Products Alternative Distribution Alliance Giant Merchandising Deals with record labels include: Maverick records Tommy Boy Sub Pop Qwest 143 Records Internet and New Media About 130 Websites including: CNN.com, AllPolitics.com, CNNSI.com, Time Digital, People, Southern Living, Sports Illustrated Turner New Media Online Services including: Compuserve, Netscape, Netcenter Pro Sports Teams and Promotions Atlanta Braves major league baseball team Atlanta Hawks NBA basketball team World Championship Wrestling Goodwill Games Other Six Flags entertainment/excursion parks Warner Bros. Movie World theme park Over 150 Warner Bros. stores, plus Turner Retail Group 25 % stake in Atari 14 % stake in Hasbro Business Connections with Other Media Companies Joint ventures, equity interests or major arrangements with Viacom, Sony, Bertelsmann, News Corp., Kirch, EMI, Tribune Co., and others.

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Timeline 1900-1970 AD 1913 the wheel cipher gets re-invented as a strip 1917 William Frederick Friedman starts working as a cryptoanalyst at Riverbank Laboratories, which also works for the U.S. Government. Later he creates a school for military cryptoanalysis - 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 Enigma machine for the German Military 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 William Frederick Friedman. As the Japanese were unable to break the US codes, they imagined their own codes to be unbreakable as well - and were not careful enough. 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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Galileo Galilee Galileo Galilee (1564-1642), the Italian Mathematician and Physicist is called the father of Enlightenment. He proofed the laws of the free fall, improved the technique for the telescope and so on. Galilee is still famous for his fights against the Catholic Church. He published his writings in Italian instead of writing in Latin. Like this, everybody could understand him, which made him popular. As he did not stop talking about the world as a ball (the Heliocentric World System) instead of a disk, the Inquisition put him on trial twice and forbid him to go on working on his experiments.

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Expert system Expert systems are advanced computer programs that mimic the knowledge and reasoning capabilities of an expert in a particular discipline. Their creators strive to clone the expertise of one or several human specialists to develop a tool that can be used by the layman to solve difficult or ambiguous problems. Expert systems differ from conventional computer programs as they combine facts with rules that state relations between the facts to achieve a crude form of reasoning analogous to artificial intelligence. The three main elements of expert systems are: (1) an interface which allows interaction between the system and the user, (2) a database (also called the knowledge base) which consists of axioms and rules, and (3) the inference engine, a computer program that executes the inference-making process. The disadvantage of rule-based expert systems is that they cannot handle unanticipated events, as every condition that may be encountered must be described by a rule. They also remain limited to narrow problem domains such as troubleshooting malfunctioning equipment or medical image interpretation, but still have the advantage of being much lower in costs compared with paying an expert or a team of specialists.

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Bruce Schneier Bruce Schneier is president of Counterpane Systems in Minneapolis. This consulting enterprise specialized in cryptography and computer security. He is the author of the book Applied Cryptography and inventor of the Blowfish and Twofish encryption algorithms.

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