Hi there,

I read this blog post
http://monty-says.blogspot.com/2014/05/for-your-eyes-only-or-adding-better.html
and wanted to inform you that we at Google has developed on-disk/block-level encryption for Innodb, aria (as used by temporary tables), binlogs and temp-files. 

The code is not yet published, but we expect it to be within a few weeks or so.
We (of course?) think that it would be better if you instead of developing new code
spent the time testing/reviewing ours.

I'm happy to answer questions on the topic,
and will let you know once we've published it.

/Jonas

ps.
Ian talked about this at percona,
https://www.percona.com/live/mysql-conference-2014/sessions/privacy-and-security-mysql-google-snowden-age