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
113
Total reports
95%
Success rate
2018
First report
2025-12-25
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 | 1.2.4.0 |
1 |
100%
|
Details |
| EIDAuthenticate | 0.5.0.4 |
1 |
0%
|
Details |
| EIDAuthenticate | 0.5.0.2 |
1 |
100%
|
Details |
| EIDAuthenticate | 1.3.1.0 |
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 |