Let's assume that a big country would ban Bitcoin completely and block traffic to Bitcointalk and other websites related to cryptocurrencies (exchanges, news etc.). It's a nonsense, isn't it? Theoretically, it could happen in my country because current government doesn't like the idea of cryptocurrencies. I heard that Trezor had a tool which allows to implement logging in with a Trezor device, what do you think about it? I guess it requires Trezor extension.