ACR3901U-S1 – Reference Manual
Version 1.09
www.acs.com.hk
Page 35 of 96
6.1.6.4.
RDR_to_SPH_AuthRsp2
This command is sent by the paired device in response to the
SPH_to_RDR_AuthRsp
.
For more information, please refer to
Offset
Field
Size
Value
Description
Encrypted
0
bMessageType
1
21h
-
No
1
LEN1 LEN2
(wLength)
2
1100h
Number of extra bytes starting
from the next field for this
message. It is expressed in
two bytes long. LEN1 is LSB
while LEN2 is MSB.
No
3
abRndNum
16
abRndNum[0:15] – 16 bytes of
random number retrieved from
the data processing server.
All the 16-byte data must be
encrypted with the Customer
Master Key that is currently
stored in ACR3901U-S1.
Yes
19
wCheckSum
1
CSUM means the XOR values
of all bytes in the command
No