Personal data
Many researchers process (collect/study/store/share) personal data when conducting their research.

Anonymisation and pseudonymisation
Applying anonymizing and pseudonymizing techniques is a measure you must take to protect the privacy of research respondents.

Definitions

Informing participants
Another very important measure is to be transparent with your research participants about which personal data you plan to process (collect/study/store/share) for which reason and at what point you will anonymize the data.

Related.

Suggested.