This paper presents μgrid, a light weight middleware for grid applications, and focuses mainly on security issues ‐more specifically on the access control to resources‐ that are critical for the gridification of many medical applications. For this purpose, we use Sygn as a distributed, certificate based, and flexible access control mechanism, which has been fully integrated in μgrid. We discuss the advantages of the solution compared to classical grid approaches and the limitations of the final architecture.
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