"Transparent" refers to the fact that data is automatically encrypted or decrypted as it is loaded or saved. Transparent encryption, also known as real-time encryption and on-the-fly encryption ( OTFE), is a method used by some disk encryption software. Some hardware-based full disk encryption systems can truly encrypt an entire boot disk, including the MBR. The expression full disk encryption (FDE) (or whole disk encryption) signifies that everything on the disk is encrypted, but the master boot record (MBR), or similar area of a bootable disk, with code that starts the operating system loading sequence, is not encrypted. It is used to prevent unauthorized access to data storage.
Disk encryption uses disk encryption software or hardware to encrypt every bit of data that goes on a disk or disk volume. Disk encryption is a technology which protects information by converting it into code that cannot be deciphered easily by unauthorized people or processes.
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