The data owner is the person who has the authority and responsibility to classify, label, and protect the information assets of the organization. The data owner is accountable for the risk of potential loss of confidential information, as they are the ones who determine the level of protection and access required for the data. The risk manager is responsible for identifying, assessing, and mitigating the risks that may affect the organization, but they are not accountable for the data itself. The end user is the person who uses the information assets for their operational tasks, but they are not accountable for the data protection or classification. The IT department is responsible for providing the technical support and infrastructure for the information assets, but they are not accountable for the data ownership or risk management. References = Risk and Information Systems Control Study Manual, Chapter 2: IT Risk Assessment, Section 2.3: Data Classification, p. 69-70.