  When building machine learning models using sensitive data, organizations
should ensure that the data processed in such systems is adequately protected.
For projects involving machine learning on personal data, Article 35 of the
GDPR mandates it to perform a Data Protection Impact Assessment (DPIA). In
addition to the threats of illegitimate access to data through security
breaches, machine learning models pose an additional privacy risk to the data
by indirectly revealing about it through the model predictions and parameters.
Guidances released by the Information Commissioner's Office (UK) and the
National Institute of Standards and Technology (US) emphasize on the threat to
data from models and recommend organizations to account for and estimate these
risks to comply with data protection regulations. Hence, there is an immediate
need for a tool that can quantify the privacy risk to data from models.
  In this paper, we focus on this indirect leakage about training data from
machine learning models. We present ML Privacy Meter, a tool that can quantify
the privacy risk to data from models through state of the art membership
inference attack techniques. We discuss how this tool can help practitioners in
compliance with data protection regulations, when deploying machine learning
models.
