MagTek MagneSafe V5 - Manual (Page 122)

MagneSafe V5
114
Ordering the decrypted blocks 1st to last we get:
HEX ASCII
2542353435323330 %B545230
3035353132323731 05512271
38395E484F47414E 89^HOGAN
2F5041554C202020 /PAUL
2020205E30383034 ^0804
3332313030303030 32100000
3030373235303030 00725000
3030303F00000000 000?
We can ignore the last four bytes because the Track 1 Absolute Length
field cites only 60 characters.
ASCII string "%B5452300551227189^HOGAN/PAUL ^08043210000000725000000?"
This is an accurate decryption of the track.
Track 2 encrypted data
72 4C 5D B7 D6 F9 01 C7
F0 FE AE 79 08 80 10 93
B3 DB FE 51 CC F6 D4 83
E7 89 D7 D2 C0 07 D5 39
49 9B AA DC C8 D1 6C A2
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
As Track 2 Encrypted Data Length cites 40 bytes only, we can eliminate
the trailing blocks:
Block # 1 724C5DB7D6F901C7
2 F0FEAE7908801093
3 B3DBFE51CCF6D483
4 E789D7D2C007D539
5 499BAADCC8D16CA2
Appendix C tells us to decrypt the last block:
499BAADCC8D16CA2 TDES Dec with 27F66D5244FF621E AA6F6120EDEB427F
gets D0BBE2E2FF07D539
XOR E789D7D2C007D539
gets 373235303F000000 (decrypted last block)
Continue on in reverse block order:
E789D7D2C007D539 TDES Dec with 27F66D5244FF621E AA6F6120EDEB427F
gets 82EBCE61FCC6E4B3
XOR B3DBFE51CCF6D483
gets 3130303030303030 (decrypted block 4)
Continue on in reverse block order:
B3DBFE51CCF6D483 TDES Dec with 27F66D5244FF621E AA6F6120EDEB427F
gets C9C39E4138B423A1
XOR F0FEAE7908801093
gets 393D303830343332 (decrypted block 3)