| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Sehrope Sarkuni <sehrope(at)jackdb(dot)com> |
| Cc: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Joe Conway <mail(at)joeconway(dot)com>, Antonin Houska <ah(at)cybertec(dot)at>, Stephen Frost <sfrost(at)snowman(dot)net>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, 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: | 2019-08-10 17:39:37 |
| Message-ID: | 20190810173937.f5ujiazfdbwxhgo7@momjian.us |
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| Lists: | pgsql-hackers |
On Wed, Aug 7, 2019 at 08:56:18AM -0400, Sehrope Sarkuni wrote:
> On Mon, Aug 5, 2019 at 9:02 PM Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> I was thinking the WAL would use the same key since the nonce is unique
> between the two. What value is there in using a different key?
> Never having to worry about overlap in Key + IV usage is main advantage. While
> it's possible to structure IVs to avoid that from happening, it's much easier
> to completely avoid that situation by ensuring different parts of an
> application are using separate derived keys.
Now that we are considering a different encryption key for heap/index
files and WAL, so there is no chance of overlap, it seems we can go back
to using a non-zero IV rather than derived keys.
--
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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