An online retailer encrypts all payment information before transmitting it over the internet, preventing attackers from intercepting sensitive financial data. Which CIA principle is being upheld?

Redundancy refers to the inclusion of extra components or systems to ensure continued operation in the event of a failure. In this context, redundancy does not pertain to the protection of sensitive data during transmission; rather, it focuses on system reliability and availability.

Availability ensures that information and services are accessible to authorized users when needed. While encrypting payment information is crucial for security, it does not directly relate to the ability to access that information; rather, it focuses on protecting the data itself.

Integrity involves maintaining the accuracy and consistency of data over its lifecycle. While encryption can contribute to data integrity by preventing unauthorized alterations, it is not the primary principle being upheld when encrypting data for secure transmission. The main focus in this scenario is on ensuring that sensitive information remains confidential.