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Integrated Delivery Systems (IDSs) now become a primary means of care provision in healthcare domain. However, existing password systems (under either the single-server model or the multi-server model) do not provide adequate security when applied to IDSs. We are thus motivated to present a practical password authentication system built upon a novel two-server model. We generalize the two-server model to an architecture of a single control server supporting multiple service servers, tailored todoi:10.1145/1128817.1128855 dblp:conf/ccs/YangDB06 fatcat:76hdzdhkj5bnfcefloqmvsz6ja