I can see this being useful for the example you gave, Mega. Currently, the list of files you upload are all downloaded to the client in order to do a search. If

I can see this being useful for the example you gave, Mega. Currently, the list of files you upload are all downloaded to the client in order to do a search. If the search could happen on the server but the file list remains encrypted, that would make the website less costly for the client.