If you are already using this YubiKey with an existing service, the following steps will overwrite the stored secret for that service. When the YubiKey is shipped its first configuration slot is factory programmed for the 'Works with YubiKey' YubiCloud OTP service and the second configuration slot is blank. The second slot is used if the button is touched between 2 and 5 seconds. The first slot is used to generate the passcode when the YubiKey is touched for between 0.3 and 1.5 seconds and released. Generate YubiKey ConfigurationĮach YubiKey with OTP support has two slots. Verify your YubiKey's capabilities at the Yubico site.

This information applies to YubiKey tokens that support one-time password (OTP) functionality, like the YubiKey 5 series or YubiKey 4 series. If you do not know the current stored secret you can use the YubiKey Manager to reconfigure the YubiKey. To use a YubiKey hardware token you will need to enter its stored secret in your Duo Admin Panel.

Learn how to configure YubiKey hardware tokens for OTP use with Duo for authentication.

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