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I'm at an institution with many users and a few system administrators on a network of mainly linux and a few unix machines. I have a two-part question. 1) Can ...
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- 05-20-2010 #1
- Join Date
- May 2010
File permissions - "root concern" - encryption?
1) Can a root user *read* the contents of a text file that I've set to be readable only for myself? (I thought it might be possible that root could *delete* any file, but not read it).
I'm concerned because I'm wondering what the best way is to make a personal text file of mine ONLY readable by myself - but preferably in a way that's simple, because I read and edit this file often.
So far what I've done is simply reduce the chances of its detection by putting it in a directory with a name beginning with a dot '.', which means it's not immediately visible, and also naming the file itself dot-something. Of course the directory and file itself are both only read/writable by myself.
How safe is this method?
Let's pretend I don't trust the system admins...can they snoop around and read my file if they somehow manage to find it?
I suspect the answer is yes.
IF so, then:
2) Can anyone suggest a good way to simply & quickly encrypt a text file so that only I can read/edit it?
Any suggestions that are really SIMPLE would be appreciated - I mean, something that can be incorporated into a simple script so that I can read/edit this file without much hassle. I edit it every day, and it's also extremely important to me, so I don't want to worry about silly errors like "crypt" creating a copy of the file and then deleting the original - but the copy didn't work, say...and then the file's gone! Or is there a simple and 100%-safe way to use crypt?
Thanks a lot for advice!!
- 05-21-2010 #2
- Join Date
- Aug 2008
The best one and easiest would be
TrueCrypt - Free Open-Source On-The-Fly Disk Encryption Software for Windows 7/Vista/XP, Mac OS X and Linux
Tutorial for it is here
TrueCrypt - Free Open-Source Disk Encryption - Documentation - Tutorial
You can even hide encrypted files with in encrypted files.