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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Among the most striking development of the 1990s has been the emergence of a global commercial media market utilizing new technologies and the global trend toward deregulation.
This global commercial media market is a result of aggressive maneuvering by the dominant firms, new technologies that make global systems cost-efficient, and neoliberal economic policies encouraged by the World Bank, IMF, WTO, and the US government to break down regulatory barriers to a global commercial media and telecommunication market.
A global oligopolistic market that covers the spectrum of media is now crystallizing the very high barriers to entry."
(Robert McChesney, author of "Rich Media, Poor Democracy")
The network structure of information and communication technologies means that even deregulated markets are not "free". The functional logic of global networks only tolerates a small number of large players. Mergers, strategic alliances, partnerships and cooperations are therefore the daily routine of the ICT business. They bypass competition and create "virtual cartels".
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The U.S. Data Encryption Standard (= DES) is the most widely used encryption algorithm, especially used for protection of financial transactions. It was developed by IBM in 1971. It is a symmetric-key cryptosystem. The DES algorithm uses a 56-bit encryption key, meaning that there are 72,057,594,037,927,936 possible keys.
for more information see:
Ronald L. Rivest is Webster Professor of Electrical Engineering and Computer Science in MIT's EECS Department. He was one of three persons in a team to invent the
The Clipper Chip is a cryptographic device proposed by the U.S. government that purportedly intended to protect private communications while at the same time permitting government agents to obtain the "keys" upon presentation of what has been vaguely characterized as "legal authorization." The "keys" are held by two government "escrow agents" and would enable the government to access the encrypted private communication. While Clipper would be used to encrypt voice transmissions, a similar chip known as Capstone
would be used to encrypt data. The underlying cryptographic algorithm, known as Skipjack, was developed by the National Security Agency (NSA).
Blowfish is a symmetric key block cipher that can vary its length.
The idea behind is a simple design to make the system faster than others.