Appendix 1: Mastercard Cryptogram Version Number Values
CVN Bit Positions
This table summarises all the CVN bit positions:
|
CVN bit position(hex) |
Meaning |
Value (binary) |
Value meaning |
Thredd supported? |
|---|---|---|---|---|
|
8-5 |
Cryptogram Version |
0001 |
Fixed for M/Chip 4 and M/Chip Advance |
Yes |
|
4-4 |
RFU |
0 |
Reserved for future use |
Yes |
|
3-2 |
Session key algorithm |
00 |
Mastercard SKD |
Yes |
|
10 |
EMV CSK |
Yes |
||
|
1-1 |
Counters included in AC data? |
0 |
No |
Yes |
|
1 |
Yes |
Yes |
CVN Values
This table summarises the resultant CVN values:
|
CVN (hex) |
CVN (binary) |
CVN (decimal) |
Value meaning |
Thredd supported? |
|---|---|---|---|---|
|
‘10’ |
00010000 |
16 |
Mastercard SKD, counters not in AC data |
Yes |
|
‘11’ |
00010001 |
17 |
Mastercard SKD, counters in AC data |
Yes |
|
‘14’ |
00010100 |
20 |
EMV CSK, counters not in AC data |
Yes |
|
‘15’ |
00010101 |
21 |
EMV CSK, counters in AC data |
Yes |
|
All other values |
All other values |
All other values |
Reserved for Future Use |
No |