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[suse-security] shred doesn't work in reiserfs?!



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I was reading the man page for shred, and it says it is not effective in 
reiser. From the man page:

"The following are examples of filesystems on  which  shred  is not effective:

       *  log-structured  or journaled [sic] filesystems, such as those
       supplied with AIX and Solaris  (and  JFS,  ReiserFS,  XFS,  Ext3,
              etc.)"

The reason is that, apparently, those filesystems do not overwrite data in 
place.

I use shred to delete some important temporary files. I keep some sensitive 
info in encrypted files. Once in a while I need to decrypt them, look at it, 
and then shred them when I'm done, keeping the encrypted version. It seems 
this procedure was giving me a false sense of security, since I use ReiserFS 
all around. Can anybody elaborate on this? Is there a shred equivalent for 
Reiser, or is Reiser immune to that kind of approach? How easy is it to 
retrieve deleted file info from a ReiserFS formatted partition?

Happy new year!
Adalberto
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