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Author Topic: Dropbox  (Read 844 times)
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June 17, 2011, 06:16:50 PM
 #1

Can you put an encrypted file inside another encrypted file?

I am running Bitcoin with the -datadir= thing to keep all my files under Truecrypt.
And I want to back them up on my DropBox account. That i encrypt with Truecrypt. So it would be 2 layers of Truecrypt and any Encryption Dropbox uses.
Would this work? Huh


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myrkul
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June 17, 2011, 06:24:22 PM
 #2

in a word, Yes.

PIE (Pre Internet Encryption) is the way to go.

Won't help you if you get a Trojan, but this will keep the wallet safe from loss.

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RambJoe
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June 17, 2011, 06:54:03 PM
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Pretty sure files aren't encrypted on Dropbox's servers, maybe encrypted on the journy.

I'd gpg -c the wallet.dat and use a strong password before trusting other people with it.
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June 18, 2011, 12:32:41 AM
 #4

Pretty sure files aren't encrypted on Dropbox's servers, maybe encrypted on the journy.

I'd gpg -c the wallet.dat and use a strong password before trusting other people with it.

He said, "And I want to back them up on my DropBox account. That i encrypt with Truecrypt."

He has a Truecrypt volume on Dropbox.  So HIS DropBox is encrypted (no one else's is, technically).

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June 18, 2011, 12:44:22 AM
 #5

http://www.truecrypt.org/hiddenvolume

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The principle is that a TrueCrypt volume is created within another TrueCrypt volume (within the free space on the volume). Even when the outer volume is mounted, it should be impossible to prove whether there is a hidden volume within it or not*, because free space on any TrueCrypt volume is always filled with random data when the volume is created** and no part of the (dismounted) hidden volume can be distinguished from random data.

TL;DR: Truecrypt website says yes.
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June 18, 2011, 12:49:18 AM
 #6

Encrypted file inside of encrypted file sounds the most like, not including Inception Tongue, a hidden volume ? so it's probably possible
myrkul
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June 18, 2011, 02:20:31 AM
 #7

Dropbox does its own encryption (Which it has the key to unlock) to prevent unauthorized access of stuff on the interwebs.

A truecrypt volume in his dropbox folder would be treated just like any other file, and encrypted again. Encrypting already encrypted data doesn't damage it.

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BitCoinBarter
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June 18, 2011, 04:27:53 AM
 #8

Q,

Just another confirmation.

What you want to do is possible and advisable.

As myrkul states, "...PIE (Pre Internet Encryption) is the way to go..."

Translation. Encrypt your things before you store them online. That way you will be safe (assuming you have a strong password/pass phrase)., if that site is ever breached (from a hacker and/or rouge employee).

Also as myrkul points out. Dropbox's encryption should not be solely relied upon (well he didn't say that, however that is what I took out of it  Wink). It they are breached, Dropbox has the keys for their encryption.

Think about it. It they are hacked, the hackers will take the data and the keys.

Do no evil,

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