User manual

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Page 39 of 61
MS246 User Manual
The serial number will be set to the same as S/N as unit’s label. The length is 8
to 10 characters. The user can read out the S/N with 52 4E command.
8.6 Decryption Example
Key for all examples is
0123456789ABCDEFFEDCBA9876543210
8.6.1. Security Level 3 Decryption - Original Encryption Format
Decryption of a three-track ABA card with the original encryption format.
The MS246 reader with default settings:
Original encryption format can be recognized because the high bit of the fourth byte
underlined (00) is 0.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STX, length (LSB, MSB), card type, track status, length track 1, length track 2, length
track 3
02 7D01 00 3F 48 23 6B
The above broken down and interpreted:
02—STX character.
7D—low byte of total length.
01—high byte of total length.
00—card type byte (interpretation old format ABA card).
3F—3 tracks of data all good.
48—length of track 1.
23—length of track 2.
6B—length of track 3.