This looks like a pretty cool project. How much research went into creating Titan? Why did Google decide to create a custom hardware-based solution (Titan) instead of using something off the shelf, like Intel's Secure Boot?
Edit: See [0] where Titan was first briefly introduced earlier this year, for an image of it attached to one of our custom networking cards.
[0] https://www.blog.google/topics/google-cloud/bolstering-secur...