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TrueCrypt timestamps

In Security Now! Listener Feedback #36, Steve and Leo addressed a question about the timestamp of TrueCrypt containers not changing when the contents of the container change (transcript). This is part of TrueCrypt's plausible deniability.

There is a simple way to turn this off inside TrueCrypt. In version 5, click Settings, then Preferences. On the Security tab, there's a checkbox for "Preserve modification time of file containers". When unchecked, this will update the timestamp of the TrueCrypt container whenever its contents change.

In the Linux command-line version of TrueCrypt 4, you could use "--update-time" to do the same thing. This functionality has been removed in version 5, so I'm using the GUI version of 5 in Ubuntu Linux.

Comments

Anonymous said…
From the truecrypt 6.1a source code (Main/CommandLineInterrface.cpp line 309), you can see that this option is now available as

--mount-options=timestamp

This turns off timestamp preservation, which is on by default.
vitorlazo said…
which is not working on linux:-(
Anonymous said…
Thanks !
Anonymous said…
@ vitorlazo:

It is working with Linux too.

1) Settings > Preferences > Register Security > disable "Preserve modification time of file containers" >
2) Register "System Integration" > enable "Do not use kernal cryptographic services"

After that the timestamp of the container changes whenever a file within the container is changed.
Tom Purl said…
Another option on Linux with the command line is to simply "touch" the volume before you mount it. The "touch" command will change the modified time to now.

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