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Prevent cold boot attack on running laptop by overwriting ram

Id like to use my laptop as a recording device when i leave home, but there would still be the possibiltity for a cold boot attack or with ddr3ram even warm boot attack is possible as i have read. Could one overwrite RAM before leaving the laptop locked and make cold boot inposssible that way?

I found this http://manpages.ubuntu.com/manpages/utopic/en/man1/sdmem.1.html

will sdmem really overwrite the RAM of a running system? If so could you write me a script that does this everytime i lock my pc?

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    xkcd.com/538
    – Panther
    Mar 5, 2015 at 3:29
  • 1
    Physical access == root access you have to limit / prevent physical access.
    – Panther
    Mar 5, 2015 at 3:30

1 Answer 1

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If you're worried the DEA might be sniffing your RAM when you're away from the house take a look at TRESOR.

The TRESOR Readme should have enough information about patching a kernel for you to be in business.

TRESOR Runs Encryption Securely Outside RAM

Another option along the lines of the question is the duplicate

How to wipe RAM on shutdown (prevent Cold Boot Attacks)?

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  • I have tried to implement your second link but the lightdm.conf files is missing in Ubuntu 14.04 so i don#t know where to paste the line session-cleanup-script=/path/to/scrip. Mar 7, 2015 at 2:19

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