Which of the following is NOT classified as confidential information?

Confidential information refers to data that is private and sensitive, requiring protection due to its nature and the potential consequences of its disclosure. Employee records, medical records, and financial information all contain personal details that require confidentiality under regulations such as HIPAA for medical records or employment law for employee records.

Open-source research papers, however, are publicly accessible and intended for broad dissemination. They do not contain private or proprietary information, as they are shared openly to promote knowledge and transparency in research. Because of this, they do not fall under the classification of confidential information. Thus, the identification of open-source research papers as the piece that is not classified as confidential is accurate.