| 摘要 |
A system includes a computer having a time retrieval unit to connect to an official time provider via a network and to retrieve an official current time, a data acceptance unit to receive information regarding a target object entered via a data input interface, an encoding unit to create and encode a machine readable identifier representing the official current time and the information regarding the target object, a marking unit to mark the target object by marking the machine readable identifier to the target object and a storage unit to store data associated with the machine readable identifier in a storage in a server.
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