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: retouch cutting colouring blue box montage morphing (71) wet operation (73) neutralizing (74) masks (75) damnatio memoriae (78) 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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Biometrics applications: physical access This is the largest area of application of biometric technologies, and the most direct lineage to the feudal gate keeping system. Initially mainly used in military and other "high security" territories, physical access control by biometric technology is spreading into a much wider field of application. Biometric access control technologies are already being used in schools, supermarkets, hospitals and commercial centres, where the are used to manage the flow of personnel. Biometric technologies are also used to control access to political territory, as in immigration (airports, Mexico-USA border crossing). In this case, they can be coupled with camera surveillance systems and artificial intelligence in order to identify potential suspects at unmanned border crossings. Examples of such uses in remote video inspection systems can be found at http://www.eds-ms.com/acsd/RVIS.htm A gate keeping system for airports relying on digital fingerprint and hand geometry is described at http://www.eds-ms.com/acsd/INSPASS.htm. This is another technology which allows separating "low risk" travellers from "other" travellers. An electronic reconstruction of feudal gate keeping capable of singling out high-risk travellers from the rest is already applied at various border crossing points in the USA. "All enrolees are compared against national lookout databases on a daily basis to ensure that individuals remain low risk". As a side benefit, the economy of time generated by the inspection system has meant that "drug seizures ... have increased since Inspectors are able to spend more time evaluating higher risk vehicles". However, biometric access control can not only prevent people from gaining access on to a territory or building, they can also prevent them from getting out of buildings, as in the case of prisons.

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

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