Disk Encryption

Disk encryption is a security measure that involves using software or hardware-based technology to encrypt all the data stored on a device, such as a hard disk or a flash drive. This form of encryption converts the data into a form that cannot be easily understood by anyone who does not have the key to decrypt it, effectively locking the data behind a cryptographic barrier. The encryption applies to all contents of the disk, making it inaccessible without the correct authentication credentials or decryption key, even if the disk is removed from the original device and placed in another.

This method is distinct from file-level encryption, which only secures specific files, and column-level database encryption, which only protects specific columns within a database. Disk encryption is particularly valuable for protecting sensitive data on laptops or other portable devices that are more susceptible to theft or loss. By encrypting the entire disk, unauthorized users are prevented from accessing any data on the device, thereby securing the information against breaches or unauthorized access.