cryptoCertum3
3B
BB
18
00
C0
10
31
FE
45
80
67
04
12
B0
03
03
00
00
81
??
??
mask: FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000
3
Total reports
100%
Success rate
2014
First report
2015-09-15
Last report
ATR Analysis
ISO 7816-3 · local
Full analysis on smartcard-atr.apdu.fr ↗
Convention
direct
Protocol
T=0
T=1
Baud rate (TA1)
Fi=372, Di=12, fmax=4MHz, 31.00 cycles/ETU
IFSC (TA3, T=1)
254 bytes
Waiting times (TB3, T=1)
CWI=5 (CWT=43 etu), BWI=4 (BWT≈5,713,920 etu)
Historical bytes
80670412B00303000081??
COMPACT-TLV (category 0x80)
TCK checksum
✗ invalid
00
| # | Byte | Name | Description |
|---|---|---|---|
| 0 | 3B | TS | Direct convention (TS = 3B) |
| 1 | BB | T0 | Format byte: 11 historical bytes, Y1=0b1011 (TA1=present, TB1=present, TC1=absent, TD1=present) |
| 2 | 18 | TA1 | TA1: Fi=372, Di=12 → 31 cycles/ETU at 5MHz |
| 3 | 00 | TB1 | TB1: deprecated Vpp programming voltage parameter |
| 4 | C0 | TD1 | TD1: T=0 protocol indicator, Y2=0b1100 (TA2=absent, TB2=absent, TC2=present, TD2=present) |
| 5 | 10 | TC2 | TC2: work waiting time for T=0, Wi=16 |
| 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 | 45 | TB3 | TB3: CWI=5 (CWT=43 etu), BWI=4 (BWT≈5,713,920 etu) |
| 9 | 80 | T1 | Historical byte 1 |
| 10 | 67 | T2 | Historical byte 2 |
| 11 | 04 | T3 | Historical byte 3 |
| 12 | 12 | T4 | Historical byte 4 |
| 13 | B0 | T5 | Historical byte 5 |
| 14 | 03 | T6 | Historical byte 6 |
| 15 | 03 | T7 | Historical byte 7 |
| 16 | 00 | T8 | Historical byte 8 |
| 17 | 00 | T9 | Historical byte 9 |
| 18 | 81 | T10 | Historical byte 10 |
| 19 | ?? | T11 | Historical byte 11 masked |
| 20 | ?? | TCK | Check byte: XOR(T0…TCK) = 39 → ✗ INVALID masked |
⚠ TCK check failed — ATR may be corrupted or masked
2 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.