[yatsyk]

I'm not asserting that couch is unsecure, I need such database but the problem that I can't see any resource that could help me design secure production system.

You can check even trivial rails blog or todo example from some book and it will be limited in scope but more or less secure. I'm having hard time to find secure couchdb example.

> Security for all systems is non trivial. But not equally hard.

If you use firebase you should understand that you getting vendor lock-in and in some cases you can spend much more money, but for some types of projects this platform is ok for me.

Same with couchdb, I understand that if I get replication with client, I need to pay by reorganising data or may be spend more resources to make system secure. There is no free lunch.