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The emergence of XML-based web services as a new software development paradigm increases the expectations of getting better software that address the various collaboration demands over Internet between organizations, or what's termed virtual Organization (VO). The development of appropriate identity management systems between these heterogeneous security domains will be the key enabler for such collaboration...
Web applications are becoming the predominant means by which users interact with online content. However, current authentication approaches use a single authentication credential to manage access permissions, which is too inflexible for distributed programs with unique security and privacy requirements for each component. In this paper, we introduce DAuth, an authorization mechanism that allows fine-grained...
Federation is an identity management model in which various tasks associated with an identity transaction are distributed among the actors involved in the transaction. This model works from the premise that distributing tasks among the actors can achieve usability and privacy advantages for the user, as well as business efficiencies for businesses or applications. Typically, federated identity manifests...
In an open environment such as the Internet, the decision to collaborate with a stranger (e.g., by granting access to a resource) is often based on the characteristics (rather than the identity) of the requester, via digital credentials: access is granted if Alice's credentials satisfy Bob's access policy. The literature contains many scenarios in which it is desirable to carry out such trust negotiations...
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