I recently upgraded my YubiKeys with the purchase of two 5C NFC devices. I worked through all the ways I use YubiKey and as I was updating my Twitter security settings I noticed something new. Twitter now supports multiple 2FA security keys and is one of the first sites I’ve run across to do so. It was great news for me as I was setting up my new 5C YubiKeys in tandem. One I would keep close by if not on me at all times and another to go in a safe. Both configured the same.
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