YubiKey 5Ci

Technical specifications
Communication support
USB-A 2.0
No
USB-C 2.0
Yes
Lightning
Yes
NFC (Near field communication)
No
NFC Specifications
N/A
Device type
HID Keyboard
Yes
CCID smart card
Yes
FIDO HID
Yes
Physical
Manufactured in
USA or Sweden
Dimensions (mm)
12 x 40.3 x 5
Weight (g)
2.9
Power consumption
<150 mW
Data transfer rate
12 Mbps
USB insertion cycles
100,000+
Write/erase cycles
500,000+
Operating thermal rating
0°C to 40°C
Storage thermal rating
-20°C to 85°C
Mean Time Between Failure (MTBF)
100+ years
Crush resistance
Up to 25 N·m
Secure element
Yes
Serialized
Yes
CPID
8880001067
HS Code
8471.80.1000
ECCN
5A992.C
CAGE
6UUE2
Hardware compliance
RoHS, UKCA, CE, MFi, EU DoC, UK, DoC, FCC
Functions
Firmware
5.7
FIDO2 L2
Yes
FIDO CTAP 2.1
Yes
FIDO U2F
Yes
Passkeys (FIDO2) slots
100
Smart card (PIV)
Yes
OpenPGP
Yes
OATH – HOTP (Event)
Yes
Yubico OTP
Yes
OATH – TOTP (Time)
Yes
Challenge-response
Yes
Static password
Yes
OATH slots
64
PIV certificates
24
OTP seeds
2
Certifications
Water/Dust resistance (IP68)
Yes
FIPS 140-2 certified
No
AAL3 standards
Yes, if FIPS isn’t required by the environment
Cryptographic specifications
RSA
PIV / OpenPGP: 1024, 2048, 3072, 4096
ECC
PIV / OpenPGP: P-256, P-384
Modern curves
Ed25519 (OpenPGP sign/auth only and FIDO2), X25519 (OpenPGP decipher only), secp256k1 (OpenPGP only), brainpoolP256r1 (OpenPGP only), brainpoolP384r1 (OpenPGP only), brainpoolP512r1 (OpenPGP only)