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Page 58 of 74
Authenticated Mode command, the KSN will increment when the increment flag is
set to 0x01.
Command Structure
Host -> Device:
<STX><S><83h><08h><Deactivation Data><ETX><LRC>
Device -> Host:
<ACK> (success)
<NAK> (fail)
<Deactivation data>: 8-bytes response to Challenge 2. It contains 7 bytes of
Challenge 2 with 1 byte of Increment Flag, encrypted by the specified variant of
current DUKPT Key
Get Reader Status Command
Command Structure
Host -> Device:
<STX><R><83h><ETX><LRC>
Device -> Host:
<ACK><STX><83h><02h><Current Reader Status><Pre-conditon><ETX><LRC>
(success)
<NAK> (fail)
Current Reader Status: 2-bytes data with one byte of <Reader State> and one byte of
<Pre-Condition>
Reader State: indicates the current state of the reader
0x00: The reader is waiting for Activate Authentication Mode Command. The
command must be sent before the card can be read.
0x01: The authentication request has been sent, the reader is waiting for the
Activation Challenge Reply Command.
0x02: The reader is waiting for a card swipe.
Pre-condition: specifies how the reader goes to its current state as follows
0x00: The reader has no card swipes and has not been authenticated since it was
powered up.
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