[vidarh]

In Norway the use of GPS has been discussed for a few years, and as far I understand the newest solutions being discussed have been approved by the data privacy watchdog, which generally tends to be very negative to government surveillance.

There are many options there, at the cost of making audits/complaints harder, such as e.g. only keeping GPS traces for a very short time (or not at all), and gradually overwrite more and more details, such as coordinates, reducing time precision, and finally consolidate to amounts owed. Those settings could be left under the control of the car owner as well, or let you dump a signed record of the precise data if you as the owner suspect inaccuracies and want to collect evidence, and then allow you to wipe the details from the device and only leave aggregate numbers.

The point is if the device is tamper-proof enough, you don't need it to record your movements, you just need it to monitor your movements and location with sufficient precision to decide what amounts should be added to running totals of tax.

Of course there is a risk some governments will decide they'd really like more detailed records.

[amanaplanacanal]

There are experiments with this sort of system in my state in the US. In our case, the car owner signs up with a private firm that does the data collection and only reports the total distance driven to the government, not the actual locations.

I would assume that there is some law which requires the detailed data to be deleted, but I'm not sure about that.