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Nope it’s implemented on the server side. I think that they are going to talk more about it at a session and maybe even in a keynote

> This can be implemented with any Database, even with current MongoDBs

Is it really all client side? How could they do things like substring matching without sending the entire index back and forth to the client? The graphic seems to show the query being executed solely on the server (although graphics often lie).

Perhaps encrypted trigrams (or some such thing) are sent during insert and search.

Then it's just a matter of counting matching trigrams/chunks. The server doesn't need to know how to read the trigrams.

We use Mongoose, for sensitive data we have a wrapper around the .pre Save() method da encrypts it before sending data to the downstream db. Feels that MongoDB implemented that, in a more elegant structured code.