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Large-scale distributed systems that are provided in an inter-organizational manner require scalable, dynamic access control paradigms for dealing with known, but also with new users. This paper presents an innovative, trust management based approach for such scenarios. It aggregates and evaluates trust levels from several trust dimensions and has been implemented as a trust based access control (TBAC)...
This paper studies the problem of securing information release in dynamic languages. We propose (i) an intuitive framework for information-release policies expressing both what can be released by an application and where in the code this release may take place and (ii) tight and modular enforcement by hybrid mechanisms that combine monitoring with on-the-fly static analysis for a language with dynamic...
Developing a system to provide support for distributed software developers (DSD) to get into collaboration is very complicated. On the first hand, it is necessary to know the characteristics of their daily work activities. On the other hand, technical aspects must be considered, such as obtaining information on the context and on the data flow of their activities. This requires information from the...
This paper addresses the problem of building a failure detection service for large scale distributed systems. We describe failure detection service, which merges some novel proposals and satisfies scalability, flexibility and adaptability properties. Afterwards, we present the architecture of such a service, show detailed information about its components and present the simulation results concerning...
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