1. ISO/IEC 27000:2018, Information technology — Security techniques — Information security management systems — Overview and vocabulary.
Section 3.28: Defines "information security" as the "preservation of confidentiality, integrity and availability of information." This standard explicitly establishes the CIA triad as the components of information security.
Section 3.7 & 3.29: Define "confidentiality" and "integrity" as properties of information, which are preserved by information security.
2. Purdue University, Secure Purdue. Information Security and Privacy Program.
Section: "Foundational Principles": States, "The Purdue University Information Security and Privacy Program is built on the foundational principles of Confidentiality, Integrity, and Availability (CIA)." This university resource confirms the CIA triad as the basis for security programs.
3. Von Solms, R., & van Niekerk, J. (2013). From information security to cyber security. Computers & Security, 38, 97-102.
Page 98, Section 2: The paper discusses the evolution of information security and explicitly states, "Information security has been defined in terms of the three well-known security objectives, confidentiality, integrity and availability (the CIA-triad)."
DOI: https://doi.org/10.1016/j.cose.2013.04.004