The Netherlands uses a nationwide, smart card based, public transport ticketing system called “OV chipkaart“. This system logs all trips made by all people travelling by public transportation in the Netherlands in one central database. This is even the case for the so called anonymous OV chipcard, which gave rise to a court case recently asking the judge to order the Dutch data protection authority to start enforcing the GDPR. And that in turn got me thinking about how to implement public transport ticketing in a privacy friendly way.

Read the rest of this entry »