Face recognition

In order to be able to recognize a person, one commonly looks at this persons face, for it is there where the visual features which distinguish one person from another are concentrated. Eyes in particular seem to tell a story not only about who somebody is, but also about how that persons feel, where his / her attention is directed, etc. People who do not want to show who they are or what is going on inside of them must mask themselves. Consequently, face recognition is a kind of electronic unmasking.

"Real" face-to-face communication is a two-way process. Looking at somebody's face means exposing ones own face and allowing the other to look at oneself. It is a mutual process which is only suspended in extraordinary and voyeuristic situations. Looking at somebody without being looked at places the person who is visually exposed in a vulnerable position vis-à-vis the watcher.

In face recognition this extraordinary situation is normal. Looking at the machine, you only see yourself looking at the machine. Face biometrics are extracted anonymously and painlessly by a mask without a face.

Therefore the resistance against the mass appropriation of biometrical data through surveillance cameras is confronted with particular difficulties. The surveillance structure is largely invisible, it is not evident what the function of a particular camera is, nor whether it is connected to a face recognition system.

In a protest action against the face recognition specialist Visionics, the Surveillance Camera Players therefor adopted the strategy of re-masking: in front of the cameras, they perfomed the play "The Masque of the Red Death" an adaption of Edgar Allen Poe's classic short story by Art Toad.

According to Visionics, whose slogan is "enabling technology with a mass appeal", there are alrady 1.1 bn digitised face images stored on identification data banks world wide. When combined with wide area surveillance camera networks, face recognition is capable of creating a transparent social space that can be controlled by a depersonalised, undetected and unaccountable centre. It is a technology, of which the surveillance engeneers of sunken totalitarian regimes may have dreamt, and one that today is being adopted by democratic governments.

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Iris recognition

Iris recognition relies upon the fact that every individuals retina has a unique structure. The iris landscape is composed of a corona, crypts, filaments, freckles, pits radial furrows and striatations. Iris scanning is considered a particularly accurate identification technology because the characteristics of the iris do not change during a persons lifetime, and because there are several hundred variables in an iris which can be measured. In addition, iris scanning is fast: it does not take longer than one or two seconds.

These are characteristics which have made iris scanning an attractive technology for high-security applications such as prison surveillance. Iris technology is also used for online identification where it can substitute identification by password. As in other biometric technologies, the use of iris scanning for the protection of privacy is a two-edged sword. The prevention of identity theft applies horizontally but not vertically, i.e. in so far as the data retrieval that accompanies identification and the data body which is created in the process has nothing to do with identity theft.

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Late 1970s - Present: Fourth Generation Computers

Following the invention of the first integrated circuits always more and more components could be fitted onto one chip. LSI (Large Scale Integration) was followed by VLSI (Very Large Scale Integration) and ULSI (Ultra-Large Scale Integration), which increased the number of components squeezed onto one chip into the millions and helped diminish the size as well as the price of computers. The new chips took the idea of the integrated circuit one step further as they allowed to manufacture one microprocessor which could then be programmed to meet any number of demands.

Also, ensuing the introduction of the minicomputer in the mid 1970s by the early 1980s a market for personal computers (PC) was established. As computers had become easier to use and cheaper they were no longer mainly utilized in offices and manufacturing, but also by the average consumer. Therefore the number of personal computers in use more than doubled from 2 million in 1981 to 5.5 million in 1982. Ten years later, 65 million PCs were being used.

Further developments included the creation of mobile computers (laptops and palmtops) and especially networking technology. While mainframes shared time with many terminals for many applications, networking allowed individual computers to form electronic co-operations. LANs (Local Area Network) permitted computers to share memory space, information, software and communicate with each other. Although already LANs could reach enormous proportions with the invention of the Internet an information and communication-network on a global basis was established for the first time.

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Palm recognition

In palm recognition a 3-dimensional image of the hand is collected and compared to the stored sample. Palm recognition devices are cumbersome artefacts (unlike fingerprint and iris recognition devices) but can absorb perform a great amount of identification acts in a short time. They are therefore preferably installed in situations where a large number of people is identified, as in airports.

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Movies as a Propaganda- and Disinformation-Tool in World War I and II

Movies produced in Hollywood in 1918/19 were mainly anti-German. They had some influence but the bigger effect was reached in World War II-movies.
The first propaganda movie of World War II was British.
At that time all films had to pass censoring. Most beloved were entertaining movies with propaganda messages. The enemy was shown as a beast, an animal-like creature, a brutal person without soul and as an idiot. Whereas the own people were the heroes. That was the new form of atrocity.
Leni Riefenstahl was a genius in this respect. Her movies still have an incredible power, while the majority of the other movies of that time look ridiculous today. The combination of light and shadow, the dramatic music and the mass-scenes that resembled ballet, had its effect and political consequences. Some of the German movies of that period still are on the index.

U.S.-President Theodore Roosevelt considered movies the best propaganda-instrument, as they are more subtle than other tools.

In the late twenties, movies got more and more important, in the USSR, too, like Sergei Eisenstein demonstrated with his movies. Historic events were changed into symbolism, exactly the way propaganda should function. It was disinformation - but in its most artistic form, especially in comparison to most U.S.- and European movies of that time.

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The Kosovo-Crisis

During the Kosovo Crisis and during the war that followed, and probably also after it, all sides of the conflict were manipulating their people and others as well, whenever they could. Some of the propaganda shown on TV was as primitive as in World War II, others were subtler. This propaganda started by telling the history of the geographic point of discussion from the own point of view, it went on with the interpretation of the motives of the enemy and finally came to censorship, manipulation of the number of victims ( for more information see: http://www.oneworld.org/index_oc/kosovo/kadare.html , spreading of atrocity stories and so on.
Many journalists and scientists are still working to detect more propaganda and disinformation stories.

An interesting detail about this war was that more people than ever before took their information about the war out of the internet. In part this had to do with the biased TV-reports on all sides. All parties put their ideas and perspectives in the net, so one could get an overview of the different thoughts and types of disinformation.
One of the big lies of NATO was the numbers of destroyed military facilities in Serbia. After the war the numbers had to be corrected down to a ridiculous number of about 13 destroyed tanks. At the same time the numbers of civilian victims turned out to be much higher than NATO had admitted in the first line. The method how European and American people had been persuaded to support the NATO-bombings was the promise to bomb only targets of the military or military-related facilities. Nearly every day NATO had to stretch this interpretation, as many civilian houses got destroyed. A cynical word was created for this kind of excuse: collateral damage.

The Serbs were not better than Western governments and media, which worked together closely. Serb TV showed the bombed targets and compared persons like Bill Clinton to Adolf Hitler and called the NATO fascist. On the other hand pictures from the situation in Kosov@ were left out in their reports.

More:
http://www.voa.gov/editorials/08261.htm (91)
http://www.foreignpolicy-infocus.org/progresp/vol3/prog3n22.html (92)
http://www.serbia-info.com/news (93)
http://www.nyu.edu/globalbeat/syndicate/Belgrade041399.html (94)
http://www.monde-diplomatique.fr/1999/08/SAID/12320.html (95)

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The history of propaganda

Thinking of propaganda some politicians' names are at once remembered, like Caesar, Napoleon, Adolf Hitler, Joseph Stalin or Saddam Hussein.
The history of propaganda has to tell then merely mentioning those names:

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Late 1960s - Early 1970s: Third Generation Computers

One of the most important advances in the development of computer hardware in the late 1960s and early 1970s was the invention of the integrated circuit, a solid-state device containing hundreds of transistors, diodes, and resistors on a tiny silicon chip. It made possible the production of large-scale computers (mainframes) of higher operating speeds, capacity, and reliability at significantly lower costs.

Another type of computer developed at the time was the minicomputer. It profited from the progresses in microelectronics and was considerably smaller than the standard mainframe, but, for instance, powerful enough to control the instruments of an entire scientific laboratory. Furthermore operating systems, that allowed machines to run many different programs at once with a central program that monitored and coordinated the computer's memory, attained widespread use.

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Advertising

Advertising as referred to in most economic books is part of the marketing mix. Therefore advertising usually is closely associated with the aim of selling products and services. Still, developments like "branding" show a tendency towards the marketing of not only products and services, but of ideas and values. While advertising activities are also pursued by political parties, politicians and governmental as well as non-governmental organizations, most of the money flowing into the advertising industry comes from corporations. Although these clients come from such diverse fields, their intentions hardly differ. Attempting to influence the public, their main goal is to sell: Products, services, ideas, values and (political) ideology.

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2000 A.D.

2000
Convergence of telephony, audiovisual technologies and computing

Digital technologies are used to combine previously separated communication and media systems such as telephony, audiovisual technologies and computing to new services and technologies, thus forming extensions of existing communication systems and resulting in fundamentally new communication systems. This is what is meant by today's new buzzwords "multimedia" and "convergence".

Classical dichotomies as the one of computing and telephony and traditional categorizations no longer apply, because these new services no longer fit traditional categories.

Convergence and Regulatory Institutions

Digital technology permits the integration of telecommunications with computing and audiovisual technologies. New services that extend existing communication systems emerge. The convergence of communication and media systems corresponds to a convergence of corporations. Recently, America Online, the world's largest online service provider, merged with Time Warner, the world's largest media corporation. For such corporations the classical approach to regulation - separate institutions regulate separate markets - is no longer appropriate, because the institutions' activities necessarily overlap. The current challenges posed to these institutions are not solely due to the convergence of communication and media systems made possible by digital technologies; they are also due to the liberalization and internationalization of the electronic communications sector. For regulation to be successful, new categorizations and supranational agreements are needed.
For further information on this issue see Natascha Just and Michael Latzer, The European Policy Response to Convergence with Special Consideration of Competition Policy and Market Power Control, http://www.soe.oeaw.ac.at/workpap.htm or http://www.soe.oeaw.ac.at/WP01JustLatzer.doc.

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Media Giants Online

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.

Broadcasting

ABC TV Network with 223 affiliated TV stations covering the entire U.S.

ABC Radio Network, with 2,900 affiliated stations throughout the U.S.

Owner of 9 VHF TV stations

Owner of 11 AM and 10 FM stations

Cable TV Systems and Channels/Networks

Disney Channel

80 % of ESPN cable TV channel and ESPN International

50 % of Lifetime cable TV channel

Internet/Interactive

Disney Interactive - entertainment and educational computer software and video games, plus development of content for on-line services.

Partnership with 3 phone companies to provide video programming and interactive services.

ABC Online

TV Production, Movies, Video, Music

Disney Television Production studios and Walt Disney Pictures movie studio

Buena Vista Television production company

Buena Vista Home Video

Miramax and Touchstone movie production companies

Buena Vista Pictures Distribution and Buena Vista International, distributors for Disney and Touchstone movies

Walt Disney Records, and Hollywood Records

Publishing

6 daily newspapers

About 40 weekly magazines, including: Discover, Women's Wear Daily, Los Angeles and Institutional Investor.

Chilton Publications

Guilford Publishing Co.

Hitchcock Publishing Co.

Theme Parks, Resorts, and Travel

Disneyland

Disney World and Disney World Resort

Part owner of Disneyland-Paris and Tokyo Disneyland

12 resort hotels

Disney Vacation Club

Cruise Lines

International TV, Film, and Broadcasting

50 % owner of Tele-München Fernseh GmbH & Co.

50 % owner of RTL Disney Fernseh GmbH & Co.

23 % owner of RTL 2 Fernseh GmbH & Co.

37,5 % owner of TM3 Fernseh GmbH & Co.

20-33 % stake in Eurosport network, Spanish Tesauro SA TV company, and Scandinavian Broadcasting System SA

20 % owner of TVA

Other

Over 500 Disney Stores, and licensing of Disney products

The Mighty Ducks professional hockey team

25 % ownership of California Angels major league baseball team

Business Connections with Other Media Companies

Joint ventures, equity interests, or major arrangements with Bertelsmann, TCI, Hearst Corp., Kirch, and various other media and telephone companies.

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Global Data Flows

Fiber-optic cables, coaxial cables, copper wires, electric power lines, microwaves, satellite communication, mobile telephony, computer networks: Various telecommunication networks following a variety of standards with bewildering abbreviations - DSL, WAP, GSM, UMTS, Ipv4 etc. - and carrying endless flows of capital and information are the blood veins of modern societies.

In the space of flows constituted by today's global data networks the space of places is transcended. Visualizations of these global data flows show arches bridging seas and continents, thereby linking the world's centres of research and development, economics and politics. In the global "Network Society" (Manuel Castells) the traditional centres of power and domination are not discarded, in the opposite, they are strengthened and reinforced by the use of information and communication technologies. Political, economical and symbolical power becomes increasingly linked to the use of modern information and communication technologies. The most sensitive and advanced centres of information and communication technologies are the stock markets. Excluded from the network constituted by modern information and communication technologies, large parts of Africa, Asia and South America, but also the poor of industrialized countries, are ranking increasingly marginal to the world economy.

Cities are centres of communications, trade and power. The higher the percentage of urban population, the more it is likely that the telecommunications infrastructure is generally good to excellent. This goes hand in hand with lower telecommunications costs. Those parts of the world with the poorest infrastructure are also the world's poorhouse. In Bangladesh for most parts of the population a personal computer is as expensive as a limousine in European one-month's salary in Europe, they have to pay eight annual salaries. Therefore telecommunications infrastructure is concentrated on the highly industrialized world: Most telephone mainlines, mobile telephones, computers, Internet accounts and Internet hosts (computers connected to the global data networks) can be found here. The same applies to media: the daily circulation of newspapers and the use of TV sets and radios. - Telecommunication and media services affordable to most parts of the population are mostly restricted to industrialized countries.

This situation will not change in the foreseeable future: Most expenditure for telecommunications infrastructure will be restricted to the richest countries in the world. In 1998, the world's richest countries consumed 75% of all cables and wires.

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The Tools of Disinformation and Propaganda

"In wartime they attack a part of the body that other weapons cannot reach in an attempt to affect the way which participants perform on the field of battle." (Taylor, Munitions of the Mind, p. 9)
Therefore the demonstrated tools refer to political propaganda in the two World Wars.

Propaganda has the ability to change a war, a natural evil, into a so-called "just" war. Violence then is supposedly defense, no more aggression.

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History: Communist Tradition

Following the communist revolutions of the 20th century all "means of production" became the property of the state as representative of "the masses". Private property ceased to exist. While moral rights of the creator were recognized and economic rights acknowledged with a one-time cash award, all subsequent rights reverted to the state.

With the transformation of many communist countries to a market system most of them have now introduced laws establishing markets in intellectual property rights. Still the high rate of piracy reflects a certain lack of legal tradition.

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Further Tools: Photography

Art has always contributed a lot to disinformation.
Many modern tools for disinformation are used in art/photography.
Harold D. Lasswell once stated that propaganda was cheaper than violence. Today this is no longer true. Technology has created new tools for propaganda and disinformation - and they are expensive. But by now our possibilities to manipulate pictures and stories have gone so far that it can get difficult to tell the difference between the original and a manipulation.

Trillions of photographs have been taken in the 20th century. Too many to look at, too many to control them and their use. A paradise for manipulation.
We have to keep in mind: There is the world, and there exist pictures of the world, which does not mean that both are the same thing. Photographs are not objective, because the photographer selects the part of the world which is becoming a picture. The rest is left out.

Some tools for manipulation of photography are:



Some of those are digital ways of manipulation, which helps to change pictures in many ways without showing the manipulation.

Pictures taken from the internet could be anything and come from anywhere. To proof the source is nearly impossible. Therefore scientists created on watermarks for pictures, which make it impossible to "steal" or manipulate a picture out of the net.

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The Egyptians ...

Besides ordinary religious manipulation-tools the Egyptians were masters of using architecture for propaganda. In Egypt, most of all, architecture was used as a media to demonstrated power, whereas the Greek and Romans used other types of art, like statues, for political propaganda.
The pyramids, palaces, tombs became tools for power demonstrations. Paintings and carvings (like on obelisks) proved the might of the rulers.
All those signs of power were done to make people compare their ruling dynasty to gods and keep them politically silent, because religion was used for justifying mortal power. Marble, gold, jewelry and artists were the tools for those maneuvers. Whereas questions for the truth were not even asked or listened to.
Finally it was the masses who were used for propaganda, when they were not only forced to work as slaves on those signs of power but also were abused for those power demonstrations, when they had to accompany the dead king into his tomb - dying of hunger, thirst, lack of oxygen and in darkness. The more religious disinformation the more luxury. The more luxury the better. The more luxury the more power.

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Internet Societal Task Force

The Internet Societal Task Force is an organization under the umbrella of the Internet Society dedicated to assure that the Internet is for everyone by identifying and characterizing social and economic issues associated with the growth and use of Internet. It supplements the technical tasks of the Internet Architecture Board, the Internet Engineering Steering Group and the Internet Engineering Task Force.

Topics under discussion are social, economic, regulatory, physical barriers to the use of the Net, privacy, interdependencies of Internet penetration rates and economic conditions, regulation and taxation.

http://www.istf.isoc.org/

http://www.istf.isoc.org/
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Satellites

Communications satellites are relay stations for radio signals and provide reliable and distance-independent high-speed connections even at remote locations without high-bandwidth infrastructure.

On point-to-point transmission, the transmission method originally employed on, satellites face increasing competition from fiber optic cables, so point-to-multipoint transmission increasingly becomes the ruling satellite technology. Point-to-multipoint transmission enables the quick implementation of private networks consisting of very small aperture terminals (VSAT). Such networks are independent and make mobile access possible.

In the future, satellites will become stronger, cheaper and their orbits will be lower; their services might become as common as satellite TV is today.

For more information about satellites, see How Satellites Work (http://octopus.gma.org/surfing/satellites) and the Tech Museum's satellite site (http://www.thetech.org/hyper/satellite).

http://www.whatis.com/vsat.htm
http://octopus.gma.org/surfing/satellites
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Josef Goebbels

Josef Goebbels (1897-1945) was Hitler's Minister for Propaganda and Public Enlightenment. He had unlimited influence on the press, the radio, movies and all kind of literary work in the whole Reich. In 1944 he received all power over the Total War. At the same time he was one of the most faithful followers of Hitler - and he followed him into death in 1945.

INDEXCARD, 3/22
 
Intellectual property

Intellectual property, very generally, relates to the output that result from intellectual activity in the industrial, scientific, literary and artistic fields. Traditionally intellectual property is divided into two branches: 1) industrial property (inventions, marks, industrial designs, unfair competition and geographical indications), and 2) copyright. The protection of intellectual property is guaranteed through a variety of laws, which grant the creators of intellectual goods, and services certain time-limited rights to control the use made of their products.

INDEXCARD, 4/22
 
Vacuum tube

The first half of the 20th century was the era of the vacuum tube in electronics. This variety of electron tube permitted the development of radio broadcasting, long-distance telephony, television, and the first electronic digital computers. These early electronic computers were, in fact, the largest vacuum-tube systems ever built. Perhaps the best-known representative is the ENIAC (Electronic Numerical Integrator and Computer, completed in 1946).

INDEXCARD, 5/22
 
Adi Shamir

Adi Shamir was one of three persons in a team to invent the RSA public-key cryptosystem. The other two authors were Ron Rivest and Leonard M. Adleman.

INDEXCARD, 6/22
 
Gaius Julius Caesar

Gaius Julius Caesar (100-44 BC) was a Roman Statesman who came to power through a military career and by buying of votes. His army won the civil war, run over Spain, Sicily and Egypt, where he made Cleopatra a Queen. For reaching even more power he increased the number of senators. But he also organized social measures to improve the people's food-situation. In February 44 BC he did not accept the kingship offered by Marc Anthony, which made him even more popular. One month later he was murdered during a senate sitting.

INDEXCARD, 7/22
 
Alexander Graham Bell

b., March 3, 1847, Edinburgh

d. Aug. 2, 1922, Beinn Bhreagh, Cape Breton Island, Nova Scotia, Canada

American audiologist and inventor wrongly remembered for having invented the telephone in 1876. Although Bell introduced the first commercial application of the telephone, in fact a German teacher called Reiss invented it.

For more detailed information see the Encyclopaedia Britannica: http://www.britannica.com/bcom/eb/article/1/0,5716,15411+1+15220,00.html

INDEXCARD, 8/22
 
RIPE

The RIPE Network Coordination Centre (RIPE NCC) is one of three Regional Internet

Registries (RIR), which exist in the world today, providing allocation and registration services which support the operation of the Internet globally, mainly the allocation of IP address space for Europe.

http://www.ripe.net

INDEXCARD, 9/22
 
Proprietary Network

Proprietary networks are computer networks with standards different to the ones proposed by the International Standardization Organization (ISO), the Open Systems Interconnection (OSI). Designed to conform to standards implemented by the manufacturer, compatibility to other network standards is not assured.

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Fiber-optic cable networks

Fiber-optic cable networks may become the dominant method for high-speed Internet connections. Since the first fiber-optic cable was laid across the Atlantic in 1988, the demand for faster Internet connections is growing, fuelled by the growing network traffic, partly due to increasing implementation of corporate networks spanning the globe and to the use of graphics-heavy contents on the World Wide Web.

Fiber-optic cables have not much more in common with copper wires than the capacity to transmit information. As copper wires, they can be terrestrial and submarine connections, but they allow much higher transmission rates. Copper wires allow 32 telephone calls at the same time, but fiber-optic cable can carry 40,000 calls at the same time. A capacity, Alexander Graham Bell might have not envisioned when he transmitted the first words - "Mr. Watson, come here. I want you" - over a copper wire.

Copper wires will not come out of use in the foreseeable future because of technologies as DSL that speed up access drastically. But with the technology to transmit signals at more than one wavelength on fiber-optic cables, there bandwidth is increasing, too.

For technical information from the Encyclopaedia Britannica on telecommunication cables, click here. For technical information from the Encyclopaedia Britannica focusing on fiber-optic cables, click here.

An entertaining report of the laying of the FLAG submarine cable, up to now the longest fiber-optic cable on earth, including detailed background information on the cable industry and its history, Neal Stephenson has written for Wired: Mother Earth Mother Board. Click here for reading.

Susan Dumett has written a short history of undersea cables for Pretext magazine, Evolution of a Wired World. Click here for reading.

A timeline history of submarine cables and a detailed list of seemingly all submarine cables of the world, operational, planned and out of service, can be found on the Web site of the International Cable Protection Committee.

For maps of fiber-optic cable networks see the website of Kessler Marketing Intelligence, Inc.

http://www.britannica.com/bcom/eb/article/4/0...
http://www.britannica.com/bcom/eb/article/4/0...
http://www.wired.com/wired/archive/4.12/ffgla...
http://www.pretext.com/mar98/features/story3....
INDEXCARD, 11/22
 
IDEA

IDEA is another symmetric-key system. It is a block cipher, operating on 64-bit plaintext blocks, having a key-length of 128 bits.

INDEXCARD, 12/22
 
Colouring

In November 1997, after the assassination of (above all Swiss) tourists in Egypt, the Swiss newspaper Blick showed a picture of the place where the attack had happened, with a tremendous pool of blood, to emphasize the cruelty of the Muslim terrorists. In other newspapers the same picture could be seen - with a pool of water, like in the original. Of course the manipulated coloured version of the Blick fit better into the mind of the shocked Swiss population. The question about death penalty arose quickly ....

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Martin Hellman

Martin Hellman was Whitfield Diffie's collegue in creating pubylic key cryptography in the 1970s.

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Caching

Caching is a mechanism that attempts to decrease the time it takes to retrieve data by storing a copy at a closer location.

INDEXCARD, 15/22
 
INTELSAT

INTELSAT is in business since 1964 and owns and operates a global communications satellite system of 17 geostationary satellites providing capacity for voice, video, corporate/private networks and Internet in more than 200 countries and territories.



http://www.intelsat.int/index.htm

INDEXCARD, 16/22
 
Edward Herman

Edward S. Herman is Professor Emeritus in Finance, Wharton School, University of Pennsylvania. Author of several books like The Myth of the Liberal Media: An Edward Herman Reader or Manufacturing Consent: The Political Economy of the Mass Media (he wrote that book - and others - together with Noam Chomsky).

INDEXCARD, 17/22
 
Polybius

Polybius was one of the greatest historians of the ancient Greek. he lived from 200-118 BC. see: Polybius Checkerboard.

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Cyrus Reed Teed

C.R. Teed (New York State) was a doctor of alternative medicine in the last century. He worked on alchemy, too. In 1870 he had the idea that the universe was made out of cells, the earth being the biggest one. Thus he imagined the world as a concave system. Out of this thought he founded a religion, calling it Koreshanity.

INDEXCARD, 19/22
 
First Monday

An English language peer reviewed media studies journal based in Denmark.

http://firstmonday.dk

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atbash

Atbash is regarded as the simplest way of encryption. It is nothing else than a reverse-alphabet. a=z, b= y, c=x and so on. Many different nations used it in the early times of writing.

for further explanations see:
http://www.ftech.net/~monark/crypto/crypt/atbash.htm

http://www.ftech.net/~monark/crypto/crypt/atb...
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Proxy Servers

A proxy server is a server that acts as an intermediary between a workstation user and the Internet so that security, administrative control, and caching service can be ensured.

A proxy server receives a request for an Internet service (such as a Web page request) from a user. If it passes filtering requirements, the proxy server, assuming it is also a cache server, looks in its local cache of previously downloaded Web pages. If it finds the page, it returns it to the user without needing to forward the request to the Internet. If the page is not in the cache, the proxy server, acting as a client on behalf of the user, uses one of its own IP addresses to request the page from the server out on the Internet. When the page is returned, the proxy server relates it to the original request and forwards it on to the user.

Source: Whatis.com

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