CompTIA ITF+ Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

The purpose of data encryption is to protect data from unauthorized access. Encryption transforms plain data into unreadable code, known as ciphertext, which can only be reverted to its readable form by someone who has the correct decryption key. This process secures sensitive information from being accessed or understood by unauthorized individuals, ensuring confidentiality. Encryption is widely used to safeguard data stored on devices and data transmitted over networks, making it a critical measure for maintaining privacy and data security in various contexts, such as banking, personal communications, and enterprise data management.

The other options do not align with the primary function of encryption. Improving storage space, enhancing software performance, or increasing data transfer speed do not relate directly to the protective aspects of encryption. Thus, the primary goal of encryption is centered around data security and confidentiality, which makes the chosen answer accurate.