There are multiple ways in which study participant privacy and confidentiality should be protected throughout the life of a project. Protective measures can be described in the Data Management and Sharing Plan (DMSP), including informed consent procedures, data de-identification procedures, and plans to respect applicable federal, Tribal, state, and local laws, regulations, and policies.
Data De-Identification:
For data involving human subjects, DO NOT deposit or share data that contains personal identifiers, or that can be re-identified based on triangulation or other methods. If you plan to share a subset of data that originally contained PII (personally identifiable information), outline how you will undertake to de-identify the data and prevent re-identification in your Data Management and Sharing Plan (DMSP). Data de-identification plans are ultimately the responsibility of the Primary Investigator (PI).
This image, based on DataONE's Data Lifecycle, shows the data confidentiality, de-identification, and legal and regulatory considerations surrounding research data sharing and re-use, and the key points in research projects when these considerations should be addressed.