CIA(Confidentiality, Integrity, and Availability) represents the foundational principles of information security. These principles form the basis for designing and implementing secure systems and protecting sensitive information.
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Confidentiality ensures that information is accessible only to those who have proper authorisation.
 
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Integrity focuses on the accuracy of data to ensure that data remains unaltered during storage, processing, and transmission.
 
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Availability ensures that data is accessible and operational when needed. It involves preventing threats that could impact the availability of services. 
 
The CIA triad provides a framework for security professionals to implement security measures.