User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 6 – Contact EMV Level 2 transaction messages 2015-04-20
Page74
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
<ETX> 1 <03>
[LRC] 1 Checksum
2
nd
Packet (Load RSA public key):
Field Length Value and description
<STX> 1 <02>
T03 3 Message ID
Op code 1 2: Load second part of RSA public key
PK
Modulus
Var Public Key Modulus, presented in
hexadecimal, data length = 2*[PK length]
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN pad
1
st
Message T03


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

1
st
CA Public Key Setup
Response Message T04
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

2
nd
Message T03


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

2
nd
CA Public Key Setup
Response Message T04
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
