| 摘要 |
A verification system for authenticating the source of data includes the transmission of positional information based on global positioning system coordinates received at the originator site (10) by a GPS receiver (32) locked onto GPS satellites. The system provides geographical positional data relevant to the user which can be compared at an authentication site (22) with stored positional data on the user. In the presence of a suitable match between the received and stored positional data, the data itself can be passed or permitted to be transmitted.
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