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Automated trust negotiation (ATN) is used to establish trust between strangers on Internet. We have propose an adaptive automated trust negotiation (AATN) model, which can adjust negotiation strategies and access control policies according to trust evaluation dynamically. In this paper, we analyze and design an AATN system based on AATN model. We improve the adaptive negotiation policy, analyze and design an access control policy language and a consistency checker. The theoretical analysis and test results reveal that the completeness of the consistency checker is good, and AATN system can take both efficiency and security into account by using the adaptive negotiation strategy.