IDPrime Fido T=1
3B
FF
??
00
00
81
31
??
43
80
31
80
65
B0
??
??
??
??
12
0F
FC
82
90
00
??
mask: FFFF00FFFFFFFF00FFFFFFFFFFFF00000000FFFFFFFFFFFF00
2
Total reports
100%
Success rate
2024
First report
2025-10-22
Last report
ATR Analysis
ISO 7816-3 · local
Full analysis on smartcard-atr.apdu.fr ↗
Convention
direct
Protocol
T=1
Guard time (TC1)
0 etu
IFSC (TA3, T=1)
0 bytes
Waiting times (TB3, T=1)
CWI=3 (CWT=19 etu), BWI=4 (BWT≈5,713,920 etu)
Historical bytes
80318065B0????????120FFC829000
COMPACT-TLV (category 0x80)
TCK checksum
✗ invalid
00
| # | Byte | Name | Description |
|---|---|---|---|
| 0 | 3B | TS | Direct convention (TS = 3B) |
| 1 | FF | T0 | Format byte: 15 historical bytes, Y1=0b1111 (TA1=present, TB1=present, TC1=present, TD1=present) |
| 2 | ?? | TA1 | TA1: Fi=372, Di=RFU masked |
| 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 | ?? | TA3 | TA3: IFSC=0 (max information field size for card) masked |
| 8 | 43 | TB3 | TB3: CWI=3 (CWT=19 etu), BWI=4 (BWT≈5,713,920 etu) |
| 9 | 80 | T1 | Historical byte 1 |
| 10 | 31 | T2 | Historical byte 2 |
| 11 | 80 | T3 | Historical byte 3 |
| 12 | 65 | T4 | Historical byte 4 |
| 13 | B0 | T5 | Historical byte 5 |
| 14 | ?? | T6 | Historical byte 6 masked |
| 15 | ?? | T7 | Historical byte 7 masked |
| 16 | ?? | T8 | Historical byte 8 masked |
| 17 | ?? | T9 | Historical byte 9 masked |
| 18 | 12 | T10 | Historical byte 10 |
| 19 | 0F | T11 | Historical byte 11 |
| 20 | FC | T12 | Historical byte 12 |
| 21 | 82 | T13 | Historical byte 13 |
| 22 | 90 | T14 | Historical byte 14 |
| 23 | 00 | T15 | Historical byte 15 |
| 24 | ?? | TCK | Check byte: XOR(T0…TCK) = 1B → ✗ INVALID masked |
⚠ TCK check failed — ATR may be corrupted or masked
7 bytes are shown as ?? because the ATRMask at those positions is 00 —
these bits are variable across card instances and were not recorded. The analysis above is based on the known bytes only.
Use smartcard-atr.apdu.fr with your card's real ATR for a complete decode.