$ sudo apt-get install nasm libwxgtk2.8-dev libfuse-dev libgtk2.0-dev ntfs-3g exfat-fuse exfat-utils byobu In order to compile TrueCrypt and use exFAT or NTFS we need to install some packages: The former scenario could be likely in a house break-in due to the small nature of the Pi, but the later usually involves pissing off your geeky revengeful friend (maybe you said that Firefly deserved to be canceled? My advice, do not upset geeks with a lot of free time in their hands). Basically there are two scenarios where storing the password is a major disadvantage: someone steals your Raspberry Pi along with the drive plugged in or someone hacks into the root account of the Raspberry Pi and a later point steals the USB drive attached. That is a big drawback but you will have to make your peace with it or mount the encrypted drive manually. TrueCrypt uses passwords and keyfiles, if you want to avoid user interaction and have the USB drive automatically mounted then the password will have to be stored locally in plain text. The last philosophical issue to point out is how secure you want it to be. The next question is, why on earth will you compile it? If you find a pre-compiled binary officially supported let me know. The first question that comes to mind is why TrueCrypt? Because it works in Linux, Windows and Mac, since we are dealing with an external drive it is quite likely that, at some point, you would like to use it in another computer, therefore it is best if no matter the operating system you can access to it. Encrypting an external USB drive using TrueCrypt.Install Raspbian on a headless Raspberry Pi. We will use the latest version available, for that we will have to compile it from source and since the target is a headless Raspberry Pi we will compile it without graphical support. This post will also present two solutions for auto-mounting TrueCrypt volumes. TrueCrypt allows full disk encryption and we are going to use it to encrypt the USB drive attached to the Raspberry Pi so you can happily carry it around when needed. Encrypting an external USB drive using TrueCrypt.
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