ACR3801 – Reference Manual
Version 2.01
www.acs.com.hk
Page 49 of 62
Step 1:
Send Authentication Certificate to the Card
Command Format (
abData
field in the
PC_to_RDR_XfrBlock
)
Where:
KEY
Key to be used for the computation of the authentication certificate:
00h: Key 1 with no cipher block chaining
01h: Key 2 with no cipher block chaining
80h: Key 1 with cipher block chaining (SLE 5536 and SLE 6636 only)
81h: Key 2 with cipher block chaining (SLE 5536 and SLE 6636 only)
CLK_CNT
Number of CLK pulses to be supplied to the card for the computation of each
bit of the authentication certificate. Typical value is 160 clocks (A0)
BYTE 1...6
Card challenge data
Response Data Format (
abData
field in the
RDR_to_PC_DataBlock
)
SW1 SW2
61h
02h
Where:
SW1 SW2
= 61 02h if no error, meaning two bytes of authentication data are ready. The
authentication data can be retrieved by
Get_Response
command.
Step 2:
Get back the Authentication Data (Get_Response)
Command Format (
abData
field in the
PC_to_RDR_XfrBlock
)
Pseudo-APDU
CLA INS
P1
P2
MEM_L
FFh
C0h 00h
00h
02h
Response Data Format (
abData
field in the
RDR_to_PC_DataBlock
)
CERT SW1 SW2
Where:
CERT
16 bits of authentication data computed by the card. The LSB of BYTE 1 is
the first authentication bit read from the card.
SW1 SW2
= 90 00h if no error
Pseudo-APDU
CLA INS P1 P2 MEM_L
CODE
KEY CLK_CNT Byte 1 Byte 2 …… Byte 5 Byte 6
FFh
84h 00h 00h
08h
