| 摘要 |
The present invention provides a digital certificate ( 2, 32 ), the certificate comprising a credential attribute function ( 6, 38 ) associated with a credential attribute property ( 5, 36 ), which credential attribute function is embedded in the certificate as an executable file, in which the credential attribute function can determine the value ( 12, 44 ) of the credential attribute property at least partly by execution of the executable file. A corresponding method is also disclosed. |
