A company's IT department is tasked with protecting sensitive client data stored on their servers. To minimize the risk of unauthorized data exposure, the department needs to implement a solution that ensures the data is unreadable without the proper decryption key, even if it falls into the wrong hands. Which method should be used to secure the data on these servers?
Using database encryption for only the tables with sensitive client data
Implementing file-level encryption for each client record individually
Full-Disk Encryption
Encrypting the email communications containing client data