the cold-boot attack

On Feb 21, 2008, at 12:17 PM, a co-worker wrote:

> Research at Princeton demonstrated that it is possible to recover
> significant information from mounted FileVault, i.e. a stolen
> sleeping laptop, using a cold reboot technique.
>
> from: <http://citp.princeton.edu/memory/>


I really like the part about cooling the RAM to -50C with a can of  
compressed air. Keeps the bits from rotting.

No one has mentioned loop-aes, for Linux, which twiddles the bits of  
the key (in RAM) periodically (XOR with a known string of random bits,  
generated at boot-time) - so it moves the key around in memory, and  
flips the ones and zeroes back and forth. I think that would  
complicate the attack mentioned in the paper.



- boyd

Boyd Waters
Scientific Programmer
National Radio Astronomy Observatory
New Mexico, USA, Earth


-
Linux-crypto:  cryptography in and on the Linux system
Archive:       http://mail.nl.linux.org/linux-crypto/