The team of researchers, after having distributed all the information to the data subjects and having collected their explicit consent, proceed to collect the biometric data of subjects. The researchers take impressions of the hands of each participant and feed these to an artificial intelligence system to extract the biometric features (e.g., hand shapes, ridges and valleys, etc.). All the components of the artificial intelligence system, including the underlying algorithm are developed and maintained in-house by the researchers, and no other subjects are involved or access the data processed by the artificial intelligence system. The artificial intelligence components of the system are developed following the steps detailed in the document ‘Guidelines on legal and ethical issues regarding artificial intelligence in ICT research and innovation’.