MagTek USB MagnePrint Swipe Reader with Encryption - Manual (Page 31)

Section 4. USB Communications
23
where:
ES = P22 (end sentinel)
LRC = Longitudinal redundancy check character
P5 = Terminating character
P11 = Pre card character
P12 = Post card character
P13 = Pre track character
P14 = Post track character
P18 = Pre card string
P19 = Post card string
P35 = Programmable field separator; this defaults to the “|” key (0x7C). Note that this
key is never found in track data or the default programmable field separators.
Tk1 SS = P20 (ISO/ABA start sentinel)
Tk2 SS = P21 (ISO/ABA 5-bit start sentinel)
P6 (7-bit start sentinel)
Tk3 SS = P8 (ISO/ABA start sentinel)
P9 (AAMVA start sentinel)
P10 (7-bit start sentinel)
Track 1, Track 2 and Track 3 Encrypted Data includes the Start and End Sentinel that were
decoded from the card.
All fields with the format P# are programmable configuration property numbers. They are
described in detail later in this document.
Reader Encryption Status
This two byte field contains the Encryption Status. The Reader Encryption Status is sent in big
endian byte order. Byte 1 is the least significant byte. Byte 1 LSB is status bit 0. Byte 2 MSB is
status bit 15. The Reader Encryption status is defined as follows:
Bit 0 = Encryption Enabled (currently always set)
Bit 1 = Initial DUKPT key Injected
Bit 2 = DUKPT Keys exhausted
Bits 3- 15 = Unassigned (always set to Zero)
Notes:
(1) Encryption will only be performed when Encryption Enabled and Initial DUKPT key
Injected are set. Otherwise, data that are normally encrypted are sent in the clear in
ASCII HEX format; the DUKPT Serial Number/counter will not be sent.
(2) When DUKPT Keys Exhausted is set, the reader will no longer read cards and after a
card swipe, the reader response will be sent as follows:
[P18] [P11] [P13] [Reader Encryption Status] [P5] [P12] [P19]