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Our system, TrustBuilder, supports automated trust negotiation between strangers on the Internet. TrustBuilder lets negotiating parties disclose relevant digital credentials and access control policies and establish the trust necessary to complete their interaction. TrustBuilder is intended for use in any situation where two entities from different security domains need to establish trust - business-to-business and retail interactions, cooperative work and joint ventures, medical records, mobile computing, and so on.
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Winslett et al. (2002) studied this question.
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