Random Number; Command Format; Command Description - Newland NL-PP60 User Manual

4.5 Random Number

4.5.1 Command Format

Sending data:
CMD
0xd0
Responding data:
CMD
0xd0
Or responding data package:
CMD
0x50
Random number: the random number is created by PINPAD, using in the sensitive service
Error Code:
0x01 Sending Data Length Field Error
0x0d EDC Error
0xff Exceptions

4.5.2 Command Description

This command is a necessary step before sensitive service authentication.
Read the random number, inside the PINPAD will keep the same random number. When
sensitive service command operations need the authentication to get the permission, random
number will attend the counting of verify Code, and compare with the authentication Code
and authentication code of server request order. It can verify the legitimacy of the request.
LEN
0x00
LEN
0x08 Random number(8
LEN
0x01
calculation of authentication code during sensitive service authentication.
EDC
Verification
DATA
bytes)
DATA
Error Code
EDC
Verification
EDC
Verification