How can encryption be implemented for data at rest?

Encryption for data at rest is primarily focused on safeguarding stored data from unauthorized access or breaches. The correct approach involves utilizing software solutions specifically designed to encrypt files and databases stored on servers. These encryption solutions transform data into a format that is unreadable without the correct decryption key, thus ensuring that even if unauthorized individuals gain access to the physical storage medium, they cannot interpret the stored data without proper authentication. This protects sensitive information, such as personal details or financial records, from various forms of compromise.

Other options, while they may enhance security in different ways, do not effectively address the concept of encrypting data at rest. Physical locks on hard drives can prevent physical access to the drives, regular data backups are critical for data recovery but do not encrypt the backup data itself, and user access control measures help in restricting access but do not encrypt the stored data. Therefore, the implementation of encryption through software solutions provides the strongest protection for data at rest by ensuring that the data remains confidential and secure from unauthorized access.