CIA Triad and Authentication vs. Authorization

The CIA Triad Confidentiality, Integrity, and Availability shapes the foundation of cybersecurity. Along with authentication and authorization, these principles ensure information systems are protected by keeping data private, credible, and accessible only to the right people.

Cybersecurity is the structure that provides guidelines for securing and protecting data and systems, while access control enforce those protections. The CIA Triad is one of the most developed models for structuring security goals, and authentication and authorization; these are practical processes that apply those goals in real-world systems. Using Chai (2022) and Microsoft (2025), this paper explains the CIA Triad, determines authentication and authorization, and provides examples.

According to Chai (2022), the CIA Triad includes three principles. Confidentiality ensures sensitive data is accessible to those that are authorized users. This can include encryption, user IDs, Biometric, and multifactor authentication. Integrity ensures all information persists accurately and trustworthy throughout its lifecycle. This can be secured through checksums, digital signatures, and version control. Availability promises that authorized users can access information when needed. Examples include backup, disaster recovery, and protection against denial-of-service attacks (DoS). Together, these principles create a balanced structure for protection systems against a wide range of threats.

Microsoft (2025) defines authentication and authorization as related but they are distinct in their own way. Authentication is the first step that verifies identity, such as logging in with a password or using multifactor authentication, and answers the question of “Who are you?”. Authorization determines what resources an authenticated identity can access, answering: What can you access? For example, in online banking, authentication may require a username, password, and a one-time code to verify identity. The same thing goes for jobs that have sensitive information that does not allow everyone in the company to see. Authorization then ensures the user can view their own account but cannot access administrative banking systems, and can only see information that is allowed through account management.

The CIA Triad and authentication/authorization are hand in hand. Confidentiality is maintained when authentication verifies user through proper security measures identity and authorization restricts access to sensitive information or resources. Integrity is maintained when only authorized users can alter or delete information. Availability depends on reliable authentication systems and authorization policies that grant timely access without creating unnecessary mishaps. Together, these principles and processes have a well rounded security framework.
The CIA Triad outlines the core security objectives to protect confidentiality, integrity, and availability meanwhile authentication and authorization define how those protections are executed. By having the CIA Triad along with access control strategies, organizations and other companies ensure that data remains private, accurate, and available while preventing unauthorized access. These concepts remain pivotal to the practice of modern cybersecurity.











Work Cited
Chai, W. (2022, June 28). What is the CIA triad? Definition, explanation, examples. TechTarget. https://www.techtarget.com/whatis/definition/Confidentiality-integrity-and-availability-CIA
Microsoft. (2025, March 21). Authentication vs. authorization. Microsoft Learn. https://learn.microsoft.com/en-us/entra/identity-platform/authentication-vs-authorization