Also you cannot do queries on the encrypted db without being able to observe the results. E.g. if you are able to initiate a query on a fraction of the data, you already have access to that fraction of the data. And you cannot initiate a meaningful query if you are a server-side observer.<p>Of course, active adversaries could give wrong results (wrong pieces of the index) back, we didn&#x27;t quite consider yet which problems that could cause.