The term 'Confidentiality' refers to the principle that ensures sensitive information is accessible only to those authorized to have access, and it's a core tenet of information security alongside integrity and availability (commonly referred to as the CIA triad). 'Authenticity' refers to the assurance that a message, transaction, or other form of data communication is from the source it claims to be from. 'Integrity' ensures that information has not been tampered with and 'Availability' refers to the information being accessible to authorized users when needed.