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Cooperation requires sharing data, but enforcing access restrictions across enterprises is a challenge. Different sites have different policies and use a variety of access control methods that are tailored to the individual enterprises' needs. Mapping one set of rules into another may require complex computations, possibly with a separate method for each… (More)
The openness and accessibility of the web Services on the Internet makes them vulnerable to various attacks. Therefore, security solutions are necessary to restrict access to web services and objects they manipulate.