| 摘要 |
The present invention provides a digital certificate ( 2, 32 ) comprising a plurality of credential attribute properties ( 6, 36 ), and a trust function ( 8, 42 ) embedded within the certificate as an executable file, which trust function can determine as a function of data ( 12, 44 ) available to it a trust value ( 14, 46 ) attributable to at least a part of the certificate at least partly by execution of the executable file. A corresponding method of communication is also disclosed.
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