On the YubiKey 4, YubiKey 4 Nano, and YubiKey 4C, there are two “configuration slots” on each key. You can program each slot with a single credential, such as one for OTP and one for Challenge-Response (such as for Microsoft Windows or Mac OS X account login) or static password. You can configure the YubiKey as a smart card (PIV) and program the YubiKey for touch-to-sign. You can store up to 32 OATH credentials (TOTP or HOTP) on the YubiKey and access them using the Yubico Authenticator companion application. In addition, you can have an unlimited number of U2F credentials on these YubiKeys.

On the YubiKey NEO and YubiKey NEO-n, there are two “configuration slots” on each key. You can program each slot with a single credential, such as one for OTP and one for Challenge-Response (such as for Microsoft Windows or Mac OS X account login) or static password. You can also configure the YubiKey as a smart card (PIV). You can store up to 28 OATH credentials (TOTP or HOTP) on the YubiKey and access them using the Yubico Authenticator companion application. In addition, you can have an unlimited number of U2F credentials on these YubiKeys.

On the YubiKey Edge/Edge-n or YubiKey Standard/Nano, there are two “configuration slots” on each key. You can program each slot with a single credential, such as one for OTP and one for Challenge-Response (such as for Microsoft Windows or Mac OS X account login) or static password. On a YubiKey Edge/Edge-n or YubiKey Standard/Nano, use the Yubico Authenticator companion application to create and access two (2) OATH-TOTP credentials (one in each configuration slot), as long as no other credentials are stored in those slots.

in Frequently Asked QuestionsGeneral Support Questions