Background: I have an SD card slot that I never use on my laptop so I decided I wanted to make it a document backup point. However, I was a little worried about someone just pulling out the card and walking off with it, so I setup some basic security.
Steps
- Find an unused SD card (I had an old 2 gig sitting around gathering dust)
- Reformat it to NTFS (I have had problems with files getting corrupted on FAT drives)
- Using TrueCrypt, create an encrypted volume on the card (I'm aware there's a way to just encrypt the entire drive, but I'm keeping things simple)
- Rather than using a password, I created a keyfile. Because the operating system is already encrypted and behind a system password, I'm reasonably confident a local file is secure enough. TrueCrypt has a keyfile creation tool built-in, but you could use almost any file above 5k and it would be astonishingly hard to break without the original.
- I then created a batch file to mount it:
Code: Select all
@echo off title Mounting TrueCrypt Volume "C:\Portable\TrueCrypt\TrueCrypt.exe" /auto /quit background /letterk /volume /keyfile C:\Portable\truecrypt_keyfile.txt "g:\backup.tc" exit- Most users are probably clear on this, but just in case: the TrueCrypt folder is in C:\Portable\TrueCrypt\TrueCrypt.exe and the keyfile is in C:\Portable\truecrypt_keyfile.txt.
- I then setup AutoVer to save .doc, .docx, and .odt files over to the drive. (put "*.doc;*.docx;*.odt" in the "include files" section of the Advanced tab)
To quickly dismount the TrueCrypt volume:
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@echo off title Dismounting TrueCrypt Volume "C:\dontbkup\Portable\TrueCrypt\TrueCrypt.exe" /quit /dismount j exit