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Page 16 of 24
BT Mag User Manual
7.2.2 Enhanced Encryption Format
Card data is sent out in the following format
<STX><LenL><LenH><Card Data><CheckLRC><CheckSum><ETX>
0
STX
1
Data Length low byte
2
Data Length high byte
3
Card Encode Type
1
4
Track 1-3 Status
2
5
Track 1 data length
6
Track 2 data length
7
Track 3 data length
8
Clear/masked data sent status
3
9
Encrypted/Hash data sent status
4
10
Track 1 clear/mask data
Track 2 clear/mask data
Track 3 clear/mask data
Track 1 encrypted data
Track 2 encrypted data
Track 3 encrypted data
Session ID (8 bytes) (Security level 4 only)
Track 1 hashed (20 bytes each) (if encrypted and hash track 1
allowed)
Track 2 hashed (20 bytes each) (if encrypted and hash track 2
allowed)
Track 3 hashed (20 bytes each) (if encrypted and hash track 3
allowed)
KSN (10 bytes)
CheckLRC
CheckSum
ETX
Where <STX> = 02h, <ETX> = 03h
Note 1 : Card Encode Type
Card Type will be 8x for enhanced encryption format and 0x for original encryption
format
Value Encode Type Description
00h / 80h ISO/ABA format
01h / 81h AAMVA format
03h / 83h Other
