Anonymous data are items of information that cannot in any way identify individuals in the data material directly through names or personal ID numbers, indirectly through background variables, or through a list of names / connection key or encryption formula or code. Anonymising data means, for example, to delete/shred any links to lists of names, email addresses and IP addresses and to categorise or, if relevant, delete any indirectly personally identifiable data. If any audio or video recordings (that can identify individuals) have been made in connection with the project, they must also be deleted/shredded or blanked out if the data material is to be anonymous. Once the data have been anonymised, it should not be possible to connect individuals to the data.
Note that, in order for data material to be regarded as anonymous, raw data must also be anonymised. Data material is not deemed to be anonymous if only the data to be published in the report, article, master's thesis etc. are anonymised.