Cyber Security Certifications Practice Test – Prep, Practice Exam & Study Guide

The method of encoding data to prevent unauthorized access is specifically referred to as encryption. Encryption transforms readable data into an unreadable format for unauthorized users, ensuring that even if data is intercepted, it remains confidential and unusable without the proper decryption key or password. This technique is fundamental in protecting sensitive information during transmission and storage, making it a crucial aspect of effective cybersecurity practices.

Encoding, while it involves changing data into a specific format, does not provide security against unauthorized access—its primary purpose is data representation rather than protection. Compression is focused on reducing the size of data for efficient storage and transmission, without altering its accessibility or security. Access control refers to the policies and mechanisms put in place to restrict who can view or use resources in a computing environment, but it does not encrypt data itself. Therefore, encryption stands out as the appropriate answer when it comes to safeguarding data from unauthorized access.