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TfL to track Tube users in stations by their MAC addresses

Doctor Syntax Silver badge

Upvoted for the statistical point but "IF done properly, then the WiFi MAC address is a reasonably good, pre-anonymised means to use"

Note that the company collecting the stats is also the company running the WiFi service so can potentially identify the user from any use they may make of that service.

A better option would be to take the MAC, hash it and save that. If that's what they mean be anonymising then that might be OK but as the report stands it should be a bit worrying.

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