What is U2F used for and what are the benefits?

As security experts we at Tuta recommend that you protect your accounts with a so-called U2F security key, like the FIDO U2F security key. U2F security keys work as follows, When you leave your home or car, you most probably lock them with a key. Similarly, you also need a key to lock your online accounts from unauthorized access. After all, your online account is just as valuabe as your home or car, right? So, it needs just as much protection. The most secure option to lock your online account credentials is to lock them with a U2F security key! In this guide we explain why U2F is important and how a U2F security key works.