VeriFone MX800 series Programmer's Manual page 306

IPP MS DUKPT C
AND OMMUNICATIONS
Common Packets
306
M X 800 S P
ERIES ROGRAMMERS
P
ACKETS
Table 45 Packet 18 Format
Data Elements
Key Management Mode
[KMM]
G
UIDE
Characteristics Comments
2AH The two digits are concatenated big-
endian, to produce a single control
byte. The key management mode
register (8 bits) in IPP7 is as follows:
0
0
1
0
1
Bit 3
0
1
Bit 4
0
1
Bit 5
0
1
Bit 6
0
1
Bit 7
0
1
Bit
1 2 Description
0 0 Old single DE
Mixed mode (1DES
0 0
and 3DES GISKE).
1 0 3DES GISKE MS
1 0 Secure messaging (not
supported in Omni
33XX)
Description
1DES DUKPT
3DES DUKPT
Description
Zero key support off
Zero key support on.
Description
Zero GISKE session key
support off
Zero GISKE session key
support on
Description
At least one MS key or KLK
key has been loaded.
All MS master keys and the
KLK are clear (no keys
loaded).
Description
MAC empty working key
support off.
MAC empty working key
support on.