A new tweet from Google they will use titan key in an new way to secure your Gmail account.

Google announced last Friday in a conference that they will launch their hardware security keys which they named it as the Titan Security Key.The Titan Security Key works in a way similar to the products offered by companies like Yubico and it offers at two-step verification for safeguarding data on the sites and services against phishing attacks and its way of verification is too strong.
Currently, Google's Titan Security Key is available only to Cloud users and the device is scheduled to be available for sale at Google Store in coming months. However, there is no word on the pricing yet.