If researchers are collecting data where no one, not even the researcher, will be able to tell where or from whom the data came, then the data is considered to be 'anonymous.' However, data which may be linked to an individual through use of codes, video/audio recording, or other identifiers would be considered to be 'identifiable data.' If a researcher promises to keep identities of participants private and not to disclose these identifiers to anyone other than the researcher, the data is considered to be 'confidential.'