This paper describes a security architecture for the Mansion mobile agent system. Mansion is a logical framework designed to support large-scale heterogenous mobile agent applications. Mansion is implemented as a multilayered middleware system in which the lowest layer provides functionality that is common to most mobile agent systems and higher layers become increasingly application aware. The security architecture presented in this paper provides secure agent communication, secure mobile agent transport and startup, and secure auditing of all changes made to agents. The system uses self-certifying names for authenticating principals in the system and provides mechanisms to control information flow.

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Existing Grid technology has been foremost designed with performance and scalability in mind. When using Grid infrastructure for medical applications, privacy and security considerations become paramount. Privacy aspects require a re-thinking of the design and implementation of common Grid middleware components. This chapter describes a novel security framework for handling privacy sensitive information on the Grid, and describes the privacy and security considerations which impacted its design.

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