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Data retention

Data retention
founder: ciba
depends on:
software license:
hardware license:

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The aim of the project was to get and visualize data retention logs from local GSM provider T-Mobile.

The project includes:

  • the legislative part (creating framework for claiming the data from any Czech GSM provider)
  • visualization part (framework for publishing the data explanative way).

Goals of the Project

Show how is data retention legislative is implemented and executed in Czech Republic. The aim was on visualizing the data in the way that did it Malte Spitz in famous article Tell-all telephone


Data was successfully retrieved from T-Mobile and precedent was made by decision of The Office for Personal Data Protection Article about data retention was published on iHNed datablog .

Getting data

Data was retrieved by § 12 Zákona č. 101/2000 Sb., o ochraně osobních údajů Full template of application could be downloaded as MS Word DOC format You will get data in .TSV file and you will be charged for fee somewhere around 280 CZK.



For displaying your changing location based on data retention was used TimeMap framework, customized version with animation is provided on GitHub repository Data from original data retention log needs to be converted a geotagged, for example by using GSMweb's BTS database


project/data_retention/start.txt · Last modified: 2016/11/28 01:48 by ruza