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Distributed applications has been a big boon for the development of several applications ranging from on-time supply chain management, virtual collaborations and several kinds of service integration across organizations. Often this leads to new challenges in security and dependability. Collaborating services in a system with a Service-Oriented-Architecture (SOA) may belong to different security realms but often need to be engaged dynamically at run-time. If their security realms do not have a direct cross-realm authentication relationship, it is technically difficult to enable any secure collaboration between the services. A potential solution to this would be to locate intermediate realms at runtime, which serve as an authentication-path between the two separate realms.
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