Certified Information Systems Security Professional (CISSP) Practice Exam 2025 – All-in-One Guide to Mastering Your Certification!

The principle that underlines the concept of privacy in information security is grounded in the confidentiality of personal information. Privacy concerns are focused on protecting individuals' information from unauthorized access or disclosure, ensuring that sensitive data is only accessible to those who are authorized to view it. This is critical in safeguarding personal identity, financial data, health information, and other private details.

In the context of information security, confidentiality means implementing measures such as encryption, access controls, and policies that govern data use and sharing to mitigate risks associated with unauthorized access. By prioritizing confidentiality, organizations uphold individuals' rights to privacy and maintain trust in their systems and operations.

The other options revolve around related concepts in information security but don't directly address the core principle of privacy. For instance, accessibility pertains to the ease of access to data, which can conflict with privacy if not managed correctly. Integrity focuses on ensuring that information remains accurate and unaltered, central to maintaining trust but not exclusive to privacy. Accountability involves tracking how data is processed and by whom, aiding in compliance but not directly defining privacy itself.