VeriFone MX800 Series User Manual

IPP MS AND DUKPT COMMUNICATIONS PACKETS
MS-Specific Packets
M
X
800 SERIES PROGRAMMERS GUIDE 315
Key-only Format
The key attribute information is not available when the key is loaded using the
key-only format (as compared to the GISKE communication protocol). The IPP
sets the default attributes to the key, as shown in Table 53.
The single-DES communication protocol between the master device and the IPP
as follows:
Sample Packet 02 in
Key-only Format
This sample packet requests the IPP to load master key 0123456789ABCDEF
into location '0'.
<SI>0200123456789ABCDEF<SO>{LRC}
Table 53 Default Key Attributes
Key Attributes Value Hex Definition
Key usage AN 0x41, 0x4E Any; no special restrictions
Key Algorithm D 0x44 DES
Key mode of use N 0x4E No special restrictions
Key version 00 0x30, 0x30 version = zero
Key length 1 0x31 single-length key
Table 54 Packet 02 Key-Only Communication Protocol
Master Device
Transmit
Direction
IPP
<SI>02[n][hhhhhhhhhhhhh-
hhh]<SO>{LRC}
• ACK if LRC
• NAK if LRC incorrect
• EOT after 3 NAKs
<SI>02[n][hhhhhhhhhhhhhhhh]<SO>{LRC}
• ACK if LRC and key echo
are okay
• NAK if LRC incorrect
• EOT after 3 NAKs
• EOT if LRC correct, but key
echo incorrect
• IPP saves the new master key only
on receipt of ACK
• EOT terminates session

VeriFone MX800 Series Specifications

General

Brand	VeriFone
Model	MX800 Series
Category	Touch terminals
Language	English