The YubiKey 5C Nano FIPS is FIPS 140-2 certified (Overall Level 1 and Level 2, Physical Security Level 3) and based on the YubiKey 5C Nano. The YubiKey 5C Nano FIPS has five distinct applications, which are all independent of each other and can be used simultaneously. Note: The YubiKey 5 FIPS Series does not support OpenPGP. Should you need this functionality, you will need either the YubiKey FIPS (4 Series) or the YubiKey 5 Series (non-FIPS).
Not sure if you have a YubiKey 5C Nano FIPS or YubiKey C Nano FIPS (4 Series)? The YubiKey 5C Nano FIPS has v5 printed near the serial number (see image above), but the C Nano FIPS (4 Series) does not. Alternatively, YubiKey Manager can be used to check the model and firmware version.
Interface
The YubiKey 5C Nano FIPS uses a USB 2.0 interface. All of the applications are available through this interface.
Applications
FIDO2
The FIDO2 application allows for secure single and multi-factor authentication, and can store up to 25 resident credentials. These credentials, which are protected by a PIN, enable passwordless login, where the YubiKey, unlocked by a PIN and authorized by touch, can log you in to your accounts without entering a username or password. The FIDO2 application is FIDO certified.
USB Interface: FIDO
U2F
Note: The YubiKey 5 FIPS Series U2F application cannot be used in a FIPS 140-2 Level 2 mode. In place of the U2F functionality, use the FIDO WebAuthn application. For more information, refer to the YubiKey 5 FIPS Series Technical Manual.
The U2F application can hold an unlimited number of U2F credentials and is FIDO certified.
USB Interface: FIDO
OTP
The OTP application contains two programmable slots, each can hold one of the following credentials:
- Yubico OTP
- HMAC-SHA1 Challenge-Response
- Static Password
- OATH-HOTP
USB Interface: OTP
OATH
The YubiKey 5 FIPS Series can hold up to 32 OATH credentials and supports both OATH-TOTP (time based) and OATH-HOTP (counter based). Accessing this application requires Yubico Authenticator.
USB Interface: CCID
PIV (Smart Card)
This application provides a PIV-compatible smart card. On Windows, the smart card functionality can be enhanced with the YubiKey Smart Card Minidriver.
Default Values:
- PIN: 123456
- PUK: 12345678
- Management Key: 010203040506070801020304050607080102030405060708
Supported Algorithms:
- RSA 1024
- RSA 2048
- ECC P256
- ECC P384
Slot Information:
- Slot 9a: Authentication
- Slot 9b: Management Key
- Slot 9c: Digital Signature
- Slot 9d: Key Management
- Slot 9e: Card Authentication
- Slot f9: Attestation
- Slots 82-95: Retired Key Management
USB Interface: CCID
Physical Specifications
Form Factor
Connector: USB-C
Dimensions: 12mm x 10.1mm x 7mm
Weight: 1g
Physical Interfaces: USB
Temperatures
Operational range: 0 °C – 40 °C (32 °F – 104 °F)
Storage range: -20 °C – 85 °C (-4 °F – 185 °F)
