Smart card
YubiKey Smart Card
3B
FD
13
00
00
81
31
FE
15
80
73
C0
21
C0
57
59
75
62
69
4B
65
79
40
115
Total reports
95%
Success rate
2018
First report
2026-07-31
Last report
ATR Analysis
ISO 7816-3 · local
Full analysis on smartcard-atr.apdu.fr ↗
Convention
direct
Protocol
T=1
Baud rate (TA1)
Fi=372, Di=4, fmax=4MHz, 93.00 cycles/ETU
Guard time (TC1)
0 etu
IFSC (TA3, T=1)
254 bytes
Waiting times (TB3, T=1)
CWI=5 (CWT=43 etu), BWI=1 (BWT≈714,240 etu)
Historical bytes
8073C021C057597562694B6579
COMPACT-TLV (category 0x80)
TCK checksum
✓ valid
40
| # | Byte | Name | Description |
|---|---|---|---|
| 0 | 3B | TS | Direct convention (TS = 3B) |
| 1 | FD | T0 | Format byte: 13 historical bytes, Y1=0b1111 (TA1=present, TB1=present, TC1=present, TD1=present) |
| 2 | 13 | TA1 | TA1: Fi=372, Di=4 → 93 cycles/ETU at 5MHz |
| 3 | 00 | TB1 | TB1: deprecated Vpp programming voltage parameter |
| 4 | 00 | TC1 | TC1: extra guard time = 0 etu |
| 5 | 81 | TD1 | TD1: T=1 protocol indicator, Y2=0b1000 (TA2=absent, TB2=absent, TC2=absent, TD2=present) |
| 6 | 31 | TD2 | TD2: T=1 protocol indicator, Y3=0b0011 (TA3=present, TB3=present, TC3=absent, TD3=absent) |
| 7 | FE | TA3 | TA3: IFSC=254 (max information field size for card) |
| 8 | 15 | TB3 | TB3: CWI=5 (CWT=43 etu), BWI=1 (BWT≈714,240 etu) |
| 9 | 80 | T1 | Historical byte 1 |
| 10 | 73 | T2 | Historical byte 2 |
| 11 | C0 | T3 | Historical byte 3 |
| 12 | 21 | T4 | Historical byte 4 |
| 13 | C0 | T5 | Historical byte 5 |
| 14 | 57 | T6 | Historical byte 6 |
| 15 | 59 | T7 | Historical byte 7 |
| 16 | 75 | T8 | Historical byte 8 |
| 17 | 62 | T9 | Historical byte 9 |
| 18 | 69 | T10 | Historical byte 10 |
| 19 | 4B | T11 | Historical byte 11 |
| 20 | 65 | T12 | Historical byte 12 |
| 21 | 79 | T13 | Historical byte 13 |
| 22 | 40 | TCK | Check byte: XOR(T0…TCK) = 00 → ✓ valid |
Software compatibility
| Software | Version | Reports | Success rate | |
|---|---|---|---|---|
| EIDAuthenticate | 1.2.6.0 |
84 |
95%
|
Details |
| EIDAuthenticate | 1.2.5.0 |
18 |
100%
|
Details |
| EIDAuthenticate | 1.3.0.0 |
7 |
86%
|
Details |
| EIDAuthenticate | 1.3.1.0 |
3 |
100%
|
Details |
| EIDAuthenticate | 1.2.4.0 |
1 |
100%
|
Details |
| EIDAuthenticate | 0.5.0.4 |
1 |
0%
|
Details |
| EIDAuthenticate | 0.5.0.2 |
1 |
100%
|
Details |
Operating system compatibility
Provider / middleware compatibility
| Provider | DLL | Version | Company | Reports | Success rate | |
|---|---|---|---|---|---|---|
| Microsoft Base Smart Card Crypto Provider | ykmd.dll |
4.1.1.210 |
Yubico AB | 83 |
96%
|
Details |
| Microsoft Base Smart Card Crypto Provider | ykmd.dll |
4.0.0.162 |
Yubico AB | 7 |
100%
|
Details |
| Microsoft Base Smart Card Crypto Provider | ykmd.dll |
4.0.4.164 |
Yubico AB | 7 |
86%
|
Details |
| Microsoft Base Smart Card Crypto Provider | ykmd.dll |
4.1.0.172 |
Yubico AB | 7 |
86%
|
Details |
| Microsoft Base Smart Card Crypto Provider | ykmd.dll |
4.6.3.252 |
Yubico AB | 7 |
86%
|
Details |
| Microsoft Base Smart Card Crypto Provider | ykmd.dll |
5.0.1.272 |
Yubico AB | 2 |
100%
|
Details |
| Microsoft Base Smart Card Crypto Provider | ykmd.dll |
5.0.4.273 |
Yubico AB | 2 |
100%
|
Details |