| 摘要 |
A method of updating a data entry stored on a data storage unit: the data entry including data elements that are unique to the data storage unit and the data entry; and the method comprising the steps of: generating at the data storage unit an update request, including the data entry, for transmission to an authority authorised to update the data entry; extracting at the authority the unique data elements from the update request, and verifying the authenticity of the data storage unit and data entry from the unique data elements, generating an updated data entry, including a further data element unique to the updated data entry and derived from the updated data, and transmitting the updated data entry to the data storage unit; and storing the updated data entry on the data storage unit. Applications include memory tags attached to equipment, on which identification or maintenance data may be recorded; or various forms of personal identity card containing data which may require updating over time, such as a driving licence, passport or identity card.
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