EFS automatically generates an encryption key pair for a user if one does not exist. Encryption services are available from Windows Explorer.
Users can also encrypt a file or folder using the command-line function cipher .
Users encrypt a file or folder by setting the encryption property for files and folders just as you set any other attribute, such as read-only, compressed, or hidden. If a user encrypts a folder, all files and subfolders created in or added to the encrypted folder are automatically encrypted. It is recommended that users encrypt at the folder level. Compressed files cannot be encrypted. Also, folders that are marked for encryption are not actually encrypted.