Which security solution protects the entire hard drive and prevents access even if the drive is moved to another system?

The chosen answer, BitLocker, is a full disk encryption feature available in Windows operating systems, designed to secure the entire hard drive of a device. BitLocker encrypts the entire volume, which includes the operating system files, user data, and application data. This level of encryption means that if the hard drive is removed and connected to another device, it remains inaccessible without the proper authentication, such as a password or a recovery key.

This robust security measure ensures that data integrity and confidentiality are maintained, even when physical control of the hardware has changed. Utilizing the AES encryption algorithm, BitLocker effectively protects against unauthorized access from individuals who may attempt to retrieve data through physical means.

In contrast, other options like EFS (Encrypting File System) encrypt specific files and folders rather than the entire disk, allowing access to other files even if some are protected. IPsec (Internet Protocol Security) is used for securing Internet Protocol communications, while VPN (Virtual Private Network) provides a secure connection over the internet but does not encrypt data on the hard drive itself. Thus, BitLocker is the most appropriate solution for protecting data at rest on the entire hard drive.