[Gllug] Cloud computing ( was Re: Linux Petition )

Fri Apr 27 22:48:40 UTC 2012

On Apr 27, 2012 5:01 PM, "Richard W.M. Jones" <rich at annexia.org> wrote:
>
> On Mon, Apr 23, 2012 at 03:24:47AM +0100, JLMS wrote:
> > The question is: if all your data and communications are properly
> > secured (encrypted disks in Red Hat, Solaris work quite well for
> > example, and with SSDs and forever more powerful machines the
> > traditional technical penalties for encrypting are becoming less of an
> > issue), what exactly would be wrong with having your data in the so
> > called cloud?
>
> Unless you've worked out an efficient homomorphic encryption scheme, I
> have to tell you that encrypting the disks on your cloud machines
> makes not the slightest bit of difference to the security of your
> cloud data.
>

Encrypting disks provides protection for "data at rest"
i.e. It protects when the computer is switched off. So in the cloud it
protects when the vm instance is shut down.
I agree, that for a cloud based always on service, not a lot of time is
spent in the off state.
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