Re: file shredding tools

["Kent Borg" <user=107@nabble.blu.org>]

 Jonathan D. Arnold / Daemon Dancing wrote: 
> I don't know the answer to your question, but my co-author just 
> wrote about shred and secure-delete on our Linux blog: 
> 
> http://linuxbraindump.org/2008/04/09/secure-data-destruction/  

Cool. 


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. 

Some companies are reported to not allow workers to travel 
internationally with any sensitive data because of this snooping, they 
insist on VPN access once arriving.  This would be a faster alternative. 

Is there such a beast? 


Thanks, 

-kb 

P.S.  XFS is reported to be not be suitable to writing an undelete 
utility.  Seems like it is therefore a bit more secure to use.  And very 
deniable. 

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