Track 1 encrypted data, Track 2 encrypted data, Track 3 encrypted data – MagTek Bluetooth MagneSafe V5 Swipe Reader User Manual
Page 26: Magneprint status
Bluetooth MagneSafe V5 Swipe Reader
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The encrypted data from each track is decoded and converted to ASCII, and then it is encrypted.
The encrypted track data includes all data starting with the start sentinel and ending with the end
sentinel. The encryption begins with the first 8 bytes of the clear text track data. The 8-byte
result of this encryption is placed in the Encrypted Data buffer for the corresponding track. The
process continues using the CBC (Cipher Block Chaining) method with the encrypted 8 bytes
XORed with the next 8 bytes of clear text. That result is placed in next 8 bytes of the Encrypted
Data buffer and the process continues until all clear text bytes have been encrypted. If the final
block of clear text contains fewer than 8 bytes, it is padded with binary zeros to fill up the 8
bytes. After this final clear text block is XORed with the prior 8 bytes of encrypted data, it is
encrypted and placed in the Encrypted Data buffer. No Initial Vector is used in the process.
Decrypting the data must be done in 8 byte blocks, ignoring any final unused bytes in the last
block. See Appendix A for more information.
Track 1 Encrypted Data
This Binary field contains the encrypted track data for track 1.
Track 2 Encrypted Data
This Binary field contains the encrypted track data for track 2.
Track 3 Encrypted Data
This Binary field contains the encrypted track data for track 3.
MagnePrint Status
This Binary field represents 32 bits of MagnePrint status information. Each character represents
4 bits (hexadecimal notation). For example, suppose the characters are: “A1050000”:
Nibble
1
2
3
4
5
6
7
8
Value
A
1
0
5
0
0
0
0
Bit
7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 23 22 21 20 19 18 17 16 31 30 29 28 27 26 25 24
Value
1 0 1 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Usage* R R R R R R R M R R R R R R R R 0 0 D 0 F L N S 0 0 0 0 0 0 0 0
* Usage Legend:
•
D =
Direction
•
F =
Too Fast
•
L =
Too Slow
•
M =
MagnePrint capable
•
N =
Too Noisy
•
R =
Revision
•
S =
Status