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Truecrypt Problems


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#1 Kevin Alt

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Posted 25 September 2008 - 02:58 PM

Hello all, wasn't really sure where to put this at in the forums. I'm doing a little experiment. I used the princeton cold boot attack and a few other tools to extract aes keys being used by truecrypt. I've been reading about how you can backup the truecrypt volume header (which is backing up a key) and things of that sort, but i can't seem to find out how i can input the key and decrypt a truecrypt volume with just the aes key. With the attack i obtained more than one key, so i'm assuming that i have both the private and public keys. Anyone with any knowledge about how i would decrypt this truecrypt file container using the keys, please let me know.

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#2 raw

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Posted 26 September 2008 - 12:16 AM

This topic is very near violating board rules. It may get closed.
The two keys you have are the TrueCrypt key and the XTS tweak key.
The implementation of this attack does not require the keys to be "cracked".
Merely fed back to the TC process that was running on a mounted encrypted
drive when the power was cut.
For TC 4 you also need the LRW tweak key.
If you manage to get a password it may only be the password for
the outer container. You still need a password for the inner container.
And if you mange to get both of those, TC can be configured to use
a "key file". Without access to the keyfile you still will not be able
to open the encrypted file. (container)
FYI - on a simple single desktop machine, trying to crack a 7 letter
password would take about 37 years.
So far AES has not been cracked.

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