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ap8's avatar
ap8
Explorer | Level 4
8 years ago
Solved

Encrypting local copies of shared files and synchronizing

Hi, I understand that encryption of the local copy of Dropbox files is my responsibility.   For various reasons, I do not want to encrypt the entire PC with Bitlocker and a boot password. I am usi...
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  • Jay's avatar
    Jay
    8 years ago
    Thanks for the detailed requirements, Alison. Sounds like how TrueCrypt works when I use it occasionally by mounting a folder of the encrypted file.
     
    Long story short, it wouldn’t work the way you want it to, since it will see it as a hard drive that no longer exists, and thus the folder will be ‘missing’. 
     
    You’ll get an error message almost instantly, and in the worst case scenario, it’ll start to delete files from your account, thinking that the files were all deleted at once.
     
    It’s similar to how having your Dropbox folder syncing on an external drive works, and my post here about the potential effects of that would apply here.
     
    Hope this helps to clarify matters!
Jay's avatar
Jay
Icon for Dropbox Community Moderator rankDropbox Community Moderator
8 years ago
I hope you find a solution that’ll give you the least amount of admin to do on your end!
ap8's avatar
ap8
Explorer | Level 4
8 years ago

Just a sanity check... it sounds like the only really safe option is to encrypt the whole system and unencrypt on boot, so nothing can start synchronising until after the unencryption has completed.

  • Boca's avatar
    Boca
    Helpful | Level 6
    7 years ago

    If I understand your need... it sounds like I am doing the same thing without any issues.

     

    I have a Veracrypt vault which looks like a single file ( eg A) to Dropbox but, when unencrypted, it mounts a new drive letter which can contain files B,C,D etc.

    When I make changes to B,C, D then close the vault, this causes a change to A which prompts Dropbox to sync it.

    I can access fille A ( and un-encrypt/encrypt) it from several locations.. using the same password.

     

    Hope this helps.

    • Dave_Rasch's avatar
      Dave_Rasch
      New member | Level 2
      6 years ago

      In TruCrypt and VeraCrypt you can set up the container without a password but with one or more key files. 

      I have my user able to run the veracrypt command via sudo without a password, then I have my key file(s) on a USB drive, and then use this command line in linux to mount automatically.  

      sudo veracrypt -t -k "<where the usb drive mounts>/<keyfile>" -p "" --non-interactive --pim=0 --fs-options=owner --protect-hidden=no /<dir>/<encrypted container> /<mnt point>/Dropbox

      Put the USB drive in and run the mount script that I have; mounts it and starts dropbox

      To remove I run a umount script; stops dropbox and unmounts the container

      So far I have had no luck geting it all working the way I like with udev ... but that will come along.

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