Yubico is a bit lack of explaining this part, so I found a great GitHub repo contributed by drduh where it contain a full explanation how to use OpenPGP with Yubikey. Especially articles under Introduction/Certificate slots, Tools/YubiKey PIV Manager(if you use Windows) and Guides. Yes, you can generate a private key on your own machine and upload it to the Yubikey. The Yubico Security Key NFC streamlines your login and offers two-factor authentication through FIDO and FIDO2 to protect your accounts online. YubiKeys are tiny, nearly indestructible hardware security keys that hang on your keychain or fit inside your USB port to prevent unauthorized access to your account.
This is the part about code signing and the key to do. Multi-protocol support allows for strong security for legacy and modern environments. Public key is generate by the private key, and sent it with the key handle to the web service. Currently enabled security keys in the live environment Key description. YubiKey 5 Series Multi-protocol security key, eliminate account takeovers with strong two-factor, multi-factor and passwordless authentication, and seamless touch-to-sign. Then feed the private key and the AppID into the HMAC function again, concatenate the output and the nonce, which becomes the key handle. At the time of generation, an integrated RNG will generate a Nonce, feed in to a HMAC-SHA256 with AppID, keyed with the device secret, the output is the private key. As far as I know, this secret can't changed by a software tweak. For short, take a look the graph below.ĭevice Secret is generated in manufacture phrase. Yubico's Developer webpage explain it very clearly.
The keys used in U2F are generated by the device it self, you can't do it yourself. Streamline authentication for existing enterprise systems and pave the way to a passwordless future.
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