confidential data: non-anonymous data which a human subject provides an investigator with the understanding or assumption that the human subject’s privacy will be honored.  Divulging the source of non-anonymous data to an outside party, or failing to ensure that no outside parties will be able to connect data with their source, normally constitutes a violation of confidentiality.  This IRB presumes that all data collected from human subjects is properly considered confidential, unless subjects have explicitly waived their presumption of confidentiality in writing.