The trustworthiness of repositories is assessed with a certification such as Data Seal of Approval and ISO 16363 standard and self-audit tool DRAMBORA. Trustworthy repositories have transparent and properly documented policies and procedures.
It is a good idea to contact repositories already in the early stage of your research project if you think about archiving your research data. Opening the research data fully is encouraged. However, you can also set restrictions (such as embargos, technological access restrictions and data use agreements) how your data can be reused.
You can search repositories in Registry of Research Data Repositories.
Examples of repositories:
See also Finnish Biobanks.
You can locate open research data by searching in data archives themselves.
Data journals publish articles that describe publicly available datasets and link to those datasets. Examples of these peer-reviewed data journals are Data in Brief and Scientific Data. Data journals are listed in in the source of dataset peer review page.
"Mixed journals" publish data papers along other types of research papers.
Research funders' Open Access Policies can be search via SHERPA/JULIET.
The Academy of Finland requires that researchers publish their work following the principles of open access and open data. It is suggested that researcher store their research data and make them available through major national or international archives or storage services that are important in their own fields.
Horizon 2020 has Open Research Data Pilot which aims to make the research data generated by selected Horizon 2020 projects accessible with as few restrictions as possible.