The doctor committed a 'breach of confidentiality'. [=the doctor told another person private information about a patient]
All medical records are treated with complete 'confidentiality'. [=are kept completely private]
Someone was leaking 'confidential' information [=telling secrets] to the press.
(..) they'll rip you an new asshole. Go tell your story. Who would believe you, a disgruntled employee with stolen confidential documents? My lawyers will have a field day with you. - They are the real sharks. - This isn't over yet, Tolley! - Not by a long shot! (..)2002 Shark Attack 3: Megalodon