Re: Data encryption

From: Barry S (barry_at_nospam.4.me.thx.com)
Date: 07/28/04 

Date: Tue, 27 Jul 2004 19:34:56 -0500

In article <fmet90pu13ii57t5s91e03qsv642rt0e85@4ax.com>, Willem wrote:
> Looking for some data encryption/implemenation suggestions:
>
> I have embedded linux boxes in the field that I would like to have the
> user be able to retrieve data from, in an encrypted and compressed
> form, and then have them send me the data on a cf card through the
> mail at which point I would decrypt/decompress the data and do some
> analysis. I've thinking of using the zip compression but the security
> looks kind of weak?
>
> Any ideas?

There are about 8000 different ways of getting this done (not exact
number ;) ) - A few things;

(1)
You say using zip compression, but then mention security -- I'm confused
What version of gzip/libgzip are you using? It has a encryption feature?

(2)
Do you want symetrical or asymetrical encryption? Symeterical -- where
there is the same key that encrypts / decrypts is fairly straight
forward, there are hundreds of tools; like ccrypt comes to mind.

(2a) Alternatively, just format the CF media with something like cfs
(never tried it, but should work). That way its automatically encrypted

(2b) If you want asymetrical encryption, there is really only one game
in town; gnupgp

-Barry

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