Abstract
Today a massive amount of data is used for machine learning (ML) and artificial intelligence (AI) to derive knowledge about the world and do automated decision making. All this data contains personal and/or sensitive data, and thus privacy is becoming more and more important. The European Union’s GDPR [9] recognizes the importance of transparency with respect to the handling of personal data. Hence it is desirable to devise means for increasing the transparency of personal data handling within an organization besides documenting processes of personal data handling. We employ blockchains as a basic building block to increase transparency with respect to personal data handling. A public blockchain serves as a trust anchor for a private blockchain, whereas the private blockchain serves as a log storage for the handling (i.e., access to and processing of) of personal and/or sensitive data. By giving the customer access to the private blockchain the customer’s trust in the enterprise is increased.
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