Which CIA principle is this protecting?

Encryption is a method used to protect data by converting it into a coded format that can only be read by someone who has the decryption key. While encryption serves to uphold confidentiality, it is a technique rather than a principle itself. Thus, it does not directly answer the question about which CIA principle is being protected.

Availability refers to ensuring that information and resources are accessible to authorized users when needed. This principle focuses on the uptime of systems and data, which does not relate to the protection of sensitive information from unauthorized access. Therefore, it does not apply in this context.

Integrity involves maintaining the accuracy and consistency of data over its entire lifecycle. It ensures that information is not altered or tampered with by unauthorized users. While critical for data management, integrity does not specifically address the issue of unauthorized access, which is central to confidentiality.