Twitter users can now secure their account with multiple security keys March 16, 2021 × Soon, security keys could be used as the only authentication method, without any other method turned on Twitter will now allow users to secure their account with multiple security keys on both, mobile and web. “Secure your account (and that alt) with multiple security keys. Now you can enrol and log in with more than one physical key on both mobile and web. And coming soon: the option to add and use security keys as your only authentication method, without any other methods turned on,” it wrote from the official Twitter support account.