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@momjian.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@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
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