Advanced Placement (AP) Computer Science 2025 – 400 Free Practice Questions to Pass the Exam

The primary function of encryption is to convert information into an unreadable format. This process involves using algorithms and keys to transform the original data, known as plaintext, into an encoded version called ciphertext. The main purpose of this transformation is to protect the confidentiality of the information, ensuring that only authorized parties with the appropriate decryption key can access and read the original data.

Encryption is essential in various contexts, such as securing sensitive communications over the internet, protecting personal information in databases, and safeguarding files by preventing unauthorized access. It plays a fundamental role in maintaining data privacy and integrity in today's digital landscape, where data breaches and cyber threats are prevalent.

While the other options discuss aspects related to data management or performance, they do not address the specific goal of encryption, which is focused on protecting information by making it unreadable to anyone who does not possess the correct key.