What is the function of BitLocker in a computer system?

BitLocker is a disk encryption feature that helps protect data on a computer system. It is designed to secure the data stored on a hard drive by encrypting the entire volume. This means that unauthorized users cannot access the files and data without the correct authentication, effectively guarding important information even if the physical drive is removed from the computer. By using advanced encryption algorithms, BitLocker ensures that data remains confidential and protected against potential breaches or theft.

Utilizing BitLocker is particularly important for organizations and individual users who handle sensitive information. Implementing disk encryption helps mitigate the risks associated with data loss or theft, especially in cases where devices may become lost or compromised. It's also a compliance requirement for many industries that handle sensitive data.

In contrast, data retrieval refers to accessing and recovering lost or archived data, which is not the primary function of BitLocker. File compression involves reducing the file size to save space and does not provide the security benefits that encryption does. Network security encompasses protocols and practices to protect data while in transit across networks, which is a different area of cybersecurity that does not directly relate to BitLocker's role in securing data at rest.