是否有像PostgreSQL和MySQL权限管理这样的CouchDB数据库的访问控制？

I'm thinking of writing a CouchDB-backed application that will store sensitive data. Is it possible to set things up so that I can get something like MySQL's and PostgreSQL's access control, where particular users on the system (users in the sense of Unix system users) can be denied or granted access to a particular CouchDB database?I'm thinking of writing a CouchDB-backed applic