On January 28th is European Data Protection Day 2019, also known as Data Privacy Day. Telefónica NEXT analyses anonymized mobile network data coming from over 45 million mobile lines run by Telefónica Germany. So for us, Data Protection Day is the perfect occasion to take a closer look at how we protect user privacy at this scale.

We asked Jonathan Ukena, our team lead for Big Data Privacy Services, in front of the camera to explain in his own words

  • What network data we use and what for
  • How we are able to bring big data analytics and privacy protection together
  • How our anonymization process works and
  • How other companies might eventually benefit from our anonymization know-how




European Data Protection Day goes back to the 28th January 1981 when the “Convention for the Protection of Individuals with regard to Automatic Processing of Personal Data” was first opened for signature by the Council of Europe.

Learn more about our Big Data Privacy Services

The day is widely used nowadays to educate about privacy and advocate user-friendly best practices in data protection. With the EU General Data Protection Regulation (GDPR) being in effect since May last year, the holiday is gaining further momentum.


Telefónica NEXT anonymizes large amounts of data in order to empower public transport providers and the whole mobility sector with data-based insights about movement flows in Germany. Retailers can use the same data set to learn more about site selection.

Learn more about how data anonymization unlocks the value of data for business analysts.