Re: XTS cipher mode for cluster file encryption

Hi,

On Tue, Feb 01, 2022 at 01:07:36PM -0500, Stephen Frost wrote:
> On Tue, Feb 1, 2022 at 12:50 Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> > On Tue, Feb 1, 2022 at 07:45:06AM +0100, Antonin Houska wrote:
> > > > With pg_upgrade modified to preserve the relfilenode, tablespace
> > > > oid, and database oid, we are now closer to implementing cluster
> > > > file encryption using XTS. I think we have a few steps left:
> > > >
> > > > 1. modify temporary file I/O to use a more centralized API
> > > > 2. modify the existing cluster file encryption patch to use XTS with a
> > > > IV that uses more than the LSN
> > > > 3. add XTS regression test code like CTR
> > > > 4. create WAL encryption code using CTR
> > > >
> > > > If we can do #1 in PG 15 I think I can have #2 ready for PG 16 in July.
> > > > The feature wiki page is:
> > > >
> > > > https://wiki.postgresql.org/wiki/Transparent_Data_Encryption
> > > >
> > > > Do people want to advance this feature forward?
> > >
> > > I confirm that we (Cybertec) do and that we're ready to spend more
> > > time on the community implementation.
> >
> > Well, I sent an email a week ago asking if people want to advance this
> > feature forward, and so far you are the only person to reply, which I
> > think means there isn't enough interest in this feature to advance it.
>
> This confuses me. Clearly there’s plenty of interest, but asking on hackers
> in a deep old sub thread isn’t a terribly good way to judge that. Yet even
> when there is an active positive response, you argue that there isn’t
> enough.

Even more so because not Antonin not only replied as an individual, but
in the name of a whole company developing Postgres in general and TDE in
particular.

Michael

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Michael Banck
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