This lecture discusses privacy, confidentiality, and security under HIPAA regulations. It defines key concepts like protected health information (PHI) and covered entities. It also outlines requirements for covered entities regarding notice of privacy practices, authorizations for disclosure, business associates, allowable disclosures, marketing rules, training, and penalties for noncompliance. The lecture concludes that while HIPAA aims to protect privacy, some argue it has made research and public health activities more difficult without substantially enhancing privacy.