file shredding tools

[Gregory Boyce]

On Tue, 15 Apr 2008, Kent Borg wrote:

> Related question: What about a utility to severely damage files in predicable 
> way.  Specifically, zero bytes at regular intervals in an encrypted file, 
> making decryption extremely difficult/impossible.  Oh, and before zeroing the 
> data, make a copy of those bytes and scp them someplace distant.
>
> If using a 128-bit cipher like AES, zero one byte out of every 16, and 
> decryption is going to be pretty damn busted.
>
> Now, travel back to US, they get snoopy and copy your disk.  No worry, they 
> won't make much sense of it.
>
> On arrival you scp the bytes back to your computer, run the damage utility 
> backwards to put the right bytes back in the file, and now it can be 
> decrypted.

Are you worried about them breaking the 128 bit AES encryption on your 
disk?  Or are you worried they're going to try to force you to decrypt it?

Breaking 128 bit AES encryption would be incrediably difficult for them to 
do.

If they're trying to force you to decrypt it, they're not just going to 
let it slide when your decryption attempt fails to work.

--
Greg

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