Personal Health Systems (PHS) allow to move the point of care from hospitals to the patient's home. Moreover, a PHS usually handles much more information and provides more appropriate diagnostic and personalized treatments to individuals. In this paper, we present the objectives, structure and expected innovations of the TAMESIS project. TAMESIS aims to contribute in advancing the state of the art of some of the technologies needed for the development of Personal Health Systems. Specifically, we propose techniques for preventing denial of service, sensor node malfunctioning and traffic injection. In addition, we explore a protocol that makes use of mobile agents for the exchange of medical records between networked databases. As a novel aspect, the protocol will not only support bilateral agreements, already existing in the literature, but multilateral agreements. In reference to clinical data, is critical to preserve the privacy and intimacy of patients. Thus, the data, at the time of being collected as for when it is exchanged, should be processed so as to avoid leakage of information that is not strictly necessary for the parties to fulfill their task correctly. A privacy metric suitable for PHS, and the incorporation of mechanisms needed for privacy and intimacy are also key objectives of this project. Finally, usability aspects of all the system interfaces will be considered.

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