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In order to describe PKI/WPKI trust models with greater precision, a predicate-based improved approach on modeling and reasoning about PKI/WPKI is proposed. By analyzing new practices such as certificate-type, certificate and organization of CA, security-risks of key-holder, web-based trust model and WAP-based trust model, six predicates are defined, nine inference rules are deduced and a four-step...
In order to improve the accuracy of trust evaluation of subscribers (or key holders) from relying parties' point of view, a new model of trust degrees for PKI is proposed. By analyzing the security risks during the applying and using process of certificates and private keys, we introduce non-trust factor (NTF); then based on NTF, a method for trust degrees of keys is presented. Comparing with the...
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