Decryption of a video file

Android Encrypt Android data - this is how it works

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Important files should be encrypted - especially on mobile devices such as smartphones. It's easy to do with the right tools. In the following you can read how to use different variants.

Why encryption?

Android itself already offers encryption at the file system level, so why file encryption? The encrypted file system ensures that nobody can access your data without unlocking the device. But if it is unlocked, the files are of course open. For example, if someone steals your smartphone directly from your hand, they also have access to the files. Encryption doesn't help at all.

With file-level encryption, the thief would see the files but would not be able to open them without knowing your password. You could also set up two-factor authentication (e.g. password plus any file) to achieve even more security. And another advantage: you can safely send encrypted files over the Internet or save them in the cloud. With the right tools, these files can later be decrypted even on the Windows, Linux or Mac desktop.

Unfortunately, there are many encryption apps that do not work, or only work in a very complicated way. We'll show you two different solutions below: Probably the simplest solution comes from EgoSecure, works flawlessly and as long as the data remains under Android, it is one of the fanciest variants ever.

Approach number two is building EncFS on, an encryption tool that also runs on desktops - unfortunately, most EncFS apps are either complicated or buggy.

File encryption with EgoSecure Encryption

  • First install EgoSecure Encryption (ESP) from Google Play.
  • ESP is basically just a file manager with encryption options. So navigate to the folder that should be encrypted or contains files that should be backed up.
  • Long tap the folder or the desired file and select the item "Encrypt". In the case of a folder, all files in it are encrypted.
  • In the subsequent dialog select the Encryption options.
  • In addition to the password and encryption strength, the mode must be selected here: "Mobile"means that the file is automatically decrypted during an action (copy, upload, move) and then processed unencrypted."Permanent"means that the file is processed in an encrypted version and therefore also with the additional file extension" .espe ". Permanent encryption is recommended if you want to distribute the files via an insecure medium (such as the Internet).

In essence, that's about it, your files are encrypted - you can tell by that Lock icon next to the files (unfortunately there is no such view on folders). Two more things are interesting: About the Menu button at the bottom you get access to the selection of several files as well as options to send them, for example. And if you use Dropbox, Google Drive or MagentaCLOUD, you can directly integrate your cloud storage.

Another tip about the workflow: When you decrypt files and exit the program, it will warn you that there are still some actually encrypted files in decrypted form. If desired, ESP can then automatically encrypt them again in one go. This prevents you from accidentally leaving files lying around openly.

Portable encryption with EncFS

EncFS stands for Encrypted Filesystem and works a little differently: Here a folder is created that is mounted in the system as a drive / volume (file system / file system). All the work takes place in the volume. Files that you copy / move there are automatically encrypted. If you unmount the volume again, there is only the associated folder - but this only contains the encrypted files. If you mount the volume again, the decrypted files are available again. The big advantage: You can also mount an EncFS-encrypted folder under Windows so that it appears there as drive "D: \", for example. Again the folder contains the encrypted variants and the drive contains the decrypted variants.

  • Install the Encdroid Multi Cloud app from Google Play.
  • Open that menu and choose here "Create volume".
  • Use the option "Local"to select a local folder for the encrypted files and enter a password.
  • You will then see the newly created volume in the main menu of the app and you can open it with the password (and thus mount it).
  • Now import via the menu the files you want. From here you can call up and edit the files as normal, you will not hear anything about the encryption. But if you unmount the volume again, there is only the associated folder with encrypted files - which cannot be accessed with an external file manager.

And now access to these files from Windows:

  • Download the complete folder to your Windows computer and install the EncFSMP program there.
  • Call up the program and click the button "Open existing EncFS".
  • In the following dialog enter as "EncFS path" the Path to your folder at. You should also use the "Drive letter", so manually select the drive letter, for example" D: ".
  • You will then find the new entry in the main menu and you can click the "Mount"activate.

You now have a folder, for example "C: \ my-encfs-folder", in which the encrypted files are located. And you have a (virtual) new drive "D: \" in which the decrypted contents of the folder are located. Everything you copy to the drive will automatically end up in the folder in encrypted form. As soon as you click on "Unmount"click, the drive disappears and only the folder remains.

Admittedly, that sounds a bit complicated at first and Encdroid Multi Cloud doesn't run smoothly with the additional features either. And as I said, many other EncFS apps are not suitable for laypeople either. But the basic function works smoothly and EncFS runs in a number of variants on a number of systems. This way, your encrypted files really remain available!

P.S .: Files encrypted with EgoSecure can also be decrypted under Windows - but only with the chargeable EgoSecure products.