| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Joe Conway <mail(at)joeconway(dot)com> |
| Cc: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Antonin Houska <ah(at)cybertec(dot)at>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, "Moon, Insung" <Moon_Insung_i3(at)lab(dot)ntt(dot)co(dot)jp>, Ibrar Ahmed <ibrar(dot)ahmad(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [Proposal] Table-level Transparent Data Encryption (TDE) and Key Management Service (KMS) |
| Date: | 2019-06-15 14:33:34 |
| Message-ID: | 20190615143333.ph2pwdnh5sdmhijp@momjian.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Fri, Jun 14, 2019 at 09:37:37PM -0400, Joe Conway wrote:
> On 6/14/19 6:09 PM, Bruce Momjian wrote:
> > On Fri, Jun 14, 2019 at 02:27:17PM -0400, Joe Conway wrote:
> >> On 6/13/19 11:07 AM, Bruce Momjian wrote:
> >> > In addition, while the 8k blocks would use a block cipher, the WAL would
> >> > likely use a stream cipher, and it will be very hard to use multiple
> >> > stream ciphers in a single WAL file.
> >>
> >> I don't understand why we would not just use AES for both.
> >
> > Uh, AES is an encryption cipher. You can use it with block mode, CBC,
> > or stream mode, CTR, GCM; see:
>
>
> AES is a block cipher, not a stream cipher. Yes you can use it in
> different modes, including chained modes (and CBC is what I would pick),
> but I assumed you were talking about an actual stream cipher algorithm.
OK, to be specific, I was thinking of using aes128-cbc for the 8k pages
and aes128-ctr for the WAL.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
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