| 摘要 |
A new system to grant or refuse access to a system, comprising a portable access device communicating with a terminal of an access point, wherein the portable access device comprises a storage means. A set of trust parameters is stored on the storage means, the set of trust parameters being used to evaluate the amount of service and/or functionality of the system being granted to the user presenting the trust parameters on the portable access device, wherein the evaluation and the decision, whether to grant or refuse access to the system is made as a result of computation of the trust parameters without revealing the identity of the user.
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