In those scenarios, client side crypto isn't even applicable to begin with. If the service requires trusting the server with sensitive information, then the bes

In those scenarios, client side crypto isn't even applicable to begin with. If the service requires trusting the server with sensitive information, then the best we can hope for is to secure the transport of the data, which is done with https. Client side crypto only comes into plays with apps where you don't want to trust the server with any sensitive data.