Re: Hiding files and encrypting stuff under Linux
From: Johannes H. Ahlmann (softpro_at_gmx.net)
Date: Thu, 31 Jul 2003 09:06:37 +0200
>> As for hiding things, what do you exactly mean by hiding? Hidden
>> from whom?
> 1. Hiding things from prying eyes while on-line.
*WHOA?* could you be any more specific on this?? you mean you want to hide
files from people on the internet who can't even access your computer? how
would anyone online be able to see any of your files in any event??
> 2. Hiding certain things from un-authorized people who might confiscate
> a computer (yes, I work in a country where they can legally do that).
so, you want to hide data from experts at data-recovery... well, you've set
yourself quite a high aim. the question is a little weird, but here's my 2
- steganography: hide data in pictures, movies, ... also you can use the
space wasted in inodes to store your data there unknown from the main
the security of steganography is questioned by some because you can find
the data hidden in pictures by analysing their frequency spectrum and
similar methods might apply to find data hidden in movies, etc... it's
rather hard to hide something with high entropy in something with less
entropy without it being visible afterwards in some way!
- as it seems to my you don't really want to hide your files but rather not
have anyone READ them! so, encrypt your files (pgp), use an encrypted
loop-back device or encrypt a whole partition...
- as to the hiding: no, it nowhere near safe! someone really looking for an
information is going to go through your hard-drive block by block until he
finds what he is looking for!
> So, in essence. How can I make sure that certain files on a Linux system
> (Redhat, Mandrake etc) are hidden from those mentioned above, but not so
> that it makes using them (by myself) a hassle each time?
> I am quite new to Linux so please forgive my ignorance. :-)