If you want to have a one-off conversation without worrying about someone intercepting and storing your conversation, use Google&#x27;s IM protocol. You won&#x27;t have to install anything.<p>If you want to protect your communications from the kinds of adversaries who can defeat Google&#x27;s security, you&#x27;re talking about a class of adversary that is largely government sponsored, and all of them are likely to be able to compromise a messaging application that boots from a web page.<p>For those serious adversaries, users need real secure messaging solutions, and today, they need to install software to do that.