YubiKey Hardware FIDO2 AAGUIDs

The FIDO2 specification states that an Authenticator Attestation GUID (AAGUID) must be provided during attestation. An AAGUID is a 128-bit identifier indicating the type of the authenticator. Authenticators with the same capabilities and firmware, such as the YubiKey 5 series devices without NFC, can share the same AAGUID.

New AAGUIDs will be issued for new YubiKey products which support FIDO2, or when existing YubiKey products have FIDO2 features added or removed.


Product Name or Laser Marking

Firmware

FIDO2 AAGUID

YubiKey 4 (Series)

All

N/A

YubiKey 5 (USB-A, No NFC)

5.1.X

cb69481e-8ff7-4039-93ec-0a2729a154a8

YubiKey 5 (USB-A, No NFC)

5.2.X

ee882879-721c-4913-9775-3dfcce97072a

YubiKey 5 NFC

5.1.X

fa2b99dc-9e39-4257-8f92-4a30d23c4118

YubiKey 5 NFC

5.2.X

2fc0579f-8113-47ea-b116-bb5a8db9202a

YubiKey 5 Nano

5.1.X

cb69481e-8ff7-4039-93ec-0a2729a154a8

YubiKey 5 Nano

5.2.X

ee882879-721c-4913-9775-3dfcce97072a

YubiKey 5C

5.1.X

cb69481e-8ff7-4039-93ec-0a2729a154a8

YubiKey 5C

5.2.X

ee882879-721c-4913-9775-3dfcce97072a

YubiKey 5C Nano

5.1.X

cb69481e-8ff7-4039-93ec-0a2729a154a8

YubiKey 5C Nano

5.2.X

ee882879-721c-4913-9775-3dfcce97072a

YubiKey 5Ci

5.2.X

c5ef55ff-ad9a-4b9f-b580-adebafe026d0

Security Key By Yubico

5.1.X

f8a011f3-8c0a-4d15-8006-17111f9edc7d

Security Key By Yubico

5.2.X

b92c3f9a-c014-4056-887f-140a2501163b

Security Key NFC

5.1.X

6d44ba9b-f6ec-2e49-b930-0c8fe920cb73

Security Key NFC

5.2.X

149a2021-8ef6-4133-96b8-81f8d5b7f1f5

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