Update README.md to reflect latest features and permissions

README.md

@@ -4,9 +4,10 @@
 A backup application for the [Android Open Source Project](https://source.android.com/).
 
 ## Features
-- Backup application data to a zip file.
-- Restore application data from a zip file.
-- Password-based encryption.
+- Backup application data to a flash drive.
+- Restore application data from a flash drive.
+- User-friendly encryption using a mnemonic phrase (BIP39).
+- Automatic daily backups that run in the background.
 
 ## Getting Started
 - Check out [the wiki](https://github.com/stevesoltys/seedvault/wiki) for information on building the application with 
@@ -14,15 +15,16 @@ AOSP.
 
 ## What makes this different?
 This application is compiled with the operating system and does not require a rooted device for use. It uses the same 
-internal APIs as `adb backup` and only requires the permission `android.permission.BACKUP` for this.
+internal APIs as `adb backup` and requires a minimal number of permissions to achieve this.
+
+## Permissions
+* `android.permission.BACKUP` to back up application data.
+* `android.permission.MANAGE_DOCUMENTS` to retrieve the available storage roots. 
+* `android.permission.MANAGE_USB` to access the serial number of USB mass storage devices.
+* `android.permission.WRITE_SECURE_SETTINGS` to change system backup settings.
 
 ## Contributing
 Bug reports and pull requests are welcome on GitHub at https://github.com/stevesoltys/seedvault. 
 
-## Permissions
-
-* `android.permission.BACKUP` to be allowed to back up apps
-* `android.permission.RECEIVE_BOOT_COMPLETED` to schedule automatic backups after boot
-
 ## License
 This application is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).