Hard Disk Encryption
Hard disk encryption (also called Full-Disk Encryption FDE) ensures that the data stored on a hard disk is protected from unauthorized access. To make this possible, the data is partially or fully encrypted. When booting, it is necessary that the data on the hard drive is either unencrypted or a special boot manager is available that decrypts the data. A key is required to read out the data. The key is obtained through authentication, for example by entering a user name and password. If the key is activated, the data is automatically encrypted or decrypted.