Windows EFS generates a separate encryption key for each file. EFS is available since Windows 2000, but it is unsupported in some cheaper versions (Windows 7 Starter, Home Basic, Home Premium). However, EFS cannot be used to encrypt the system drive. It allows the user to encrypt individual files, folders or even all files in a drive very easily. Windows Encrypting File System (EFS) is a feature in the NTFS file system that is used in the Windows operating system. Truecrypt works on all of the three operating systems, although for system drive encryption it is used mostly in Windows. In Mac OS X there is FileVault 2 and in many Linux distributions LUKS and DM-crypt are most used. For Windows there is Bitlocker, although is is available only for more feature-full versions of Windows (Enterprise, Ultimate, Server). Most operating systems have system drive encryption software bundled with them. When the system drive is encrypted, the decryption password is requested right after starting the computer, before the operating system can start loading. In Windows, the system drive is the C:\ drive, in Mac OS X and Linux it is where the root file system / is. The system drive is a disk (or its partition) where the operating system files reside and that is used to boot up the system. Also, operating system profile setting as well as web browsing history is unprotected in this case.Īnother approach is to encrypt the whole disk, including the system drive. It is important to understand that all other files are left unencrypted - the temporary files created when opening an attachment from e-mail or editing an Office document may be placed outside the encrypted folder by the operating system. Windows Encrypting File System, Truecrypt, Boxcryptor and even PGP are examples of software that encrypt individual files. For example, one can use such software to encrypt only work-related documents. First, some software is for encrypting individual files and folders in a computer. ![]() ![]() In principle encryption software can be divided in two categories.
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