Comment by gefhfffh
4 years ago
I wonder how you would build an encrypted messenger like like Element (app.element.io) without SPA style.
I think it's not even possible, since you are required to process incoming messages client side and must not send any private keys to the server.
This is irrelevant in practice because the SPA's code is also loaded from the server - if the server is malicious it'll just serve you backdoored JS, unless you load from a separate domain and have the main server allow cross-origin requests.
If you want to defend against a malicious server you need to make sure your client doesn't load & execute code from said server - it needs to be distributed as a stand-alone application instead of in a browser.
> unless you load from a separate domain
Which is the case... app.element.io doesn't host a Matrix server. Servers are completely independent of that.