Timeline BC ~ 1900 BC: Egyptian writers use non-standard Hieroglyphs in inscriptions of a royal tomb; supposedly this is not the first but the first documented example of written cryptography 1500 an enciphered formula for the production of pottery is done in Mesopotamia parts of the Hebrew writing of Jeremiah's words are written down in "atbash", which is nothing else than a reverse alphabet and one of the first famous methods of enciphering 4th century Aeneas Tacticus invents a form of beacons, by introducing a sort of water-clock 487 the Spartans introduce the so called "skytale" for sending short secret messages to and from the battle field 170 Polybius develops a system to convert letters into numerical characters, an invention called the Polybius Chequerboard. 50-60 Julius Caesar develops an enciphering method, later called the Caesar Cipher, shifting each letter of the alphabet an amount which is fixed before. Like atbash this is a monoalphabetic substitution.

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Actual Findings on Internet Advertising Although Web advertising becomes a significant portion of marketing budgets, advertisers are still unsure on how to unlock the potential of the Internet. Current findings show that: - Consumer brands spend only a fraction of their advertising budget on on-line advertising. - Technology companies spend five times more on advertising in the WWW. - While banner campaigns are still popular, there is no standardized solution for on-line advertising. - Ad pricing is based on CPM (costs per 1.000 visitors), rather than on results. - Personalized targeting has not yet taken hold. Instead advertisers mainly target on content. At the moment three dominant models are used for Internet advertising: Destination Sites: They use entertainment, high production values and information to pull users in and bring them back again. Micro Sites: Content sites or networks host small clusters of brand pages. Banner Campaigns: Those include other forms of Web advertising like sponsorships.

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Mark A mark (trademark or service mark) is "... a sign, or a combination of signs, capable of distinguishing the goods or services of one undertaking from those of other undertakings. The sign may particularly consist of one or more distinctive words, letters, numbers, drawings or pictures, emblems, colors or combinations of colors, or may be three-dimensional..." (WIPO) To be protected a mark must be registered in a government office whereby generally the duration is limited in time, but can be periodically (usually every 10 years) renewed.

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