Encryption scrambles the data on the hard drive so it only can be read by particular software. Digital copiers and printers that offer encryption encode the data stored on the hard drive so that it cannot be retrieved even if the hard drive is removed from the machine. Some units even offer encryption for data in transit, which means that all communication to and from the device can be encrypted (scan jobs, print jobs, etc.).
Overwriting, also known as file wiping or shredding, changes the values of the bits on the disk that make up a file by overwriting existing data with random characters. By overwriting the disk space that the file occupied, its traces are removed, and the file can’t be reconstructed as easily.
Passcodes can be used to add yet another layer of security. This involves the ability to lock your printers’ hard drives using passcode protections. This means that the data is protected, even if the drive is removed from the machine.