MagTek iDynamo MagneSafe V5 - Manual (Page 54)

iDynamo MagneSafe V5 Communication Manual
48
gets 76C6CFD8A59C0000 (decrypted last block)
Continue on in reverse block order:
7FD0E212B479C60B TDES Dec with 27F66D5244FF621E AA6F6120EDEB427F
gets AE81BFA4A2C80006
XOR C07B12648DCAC4FD
gets 6EFAADC02F02C4FB (decrypted block 6)
Continue on in reverse block order:
C07B12648DCAC4FD TDES Dec with 27F66D5244FF621E AA6F6120EDEB427F
gets AAC8D06ACCF27E6D
XOR BE6EE7466B81196E
gets 14A6372CA7736703 (decrypted block 5)
Continue on in reverse block order:
BE6EE7466B81196E TDES Dec with 27F66D5244FF621E AA6F6120EDEB427F
gets 01D78CB7D1DAEA95
XOR 6F4B691E633C311C
gets 6E9CE5A9B2E6DB89 (decrypted block 4)
Continue on in reverse block order:
6F4B691E633C311C TDES Dec with 27F66D5244FF621E AA6F6120EDEB427F
gets 0D2620B051231748
XOR 32BA90BFB3E6B41D
gets 3F9CB00FE2C5A355 (decrypted block 3)
Continue on in reverse block order:
32BA90BFB3E6B41D TDES Dec with 27F66D5244FF621E AA6F6120EDEB427F
gets 41499B60A6AAD427
XOR 8628E664C59BBAA2
gets C7617D0463316E85 (decrypted block 2)
Continue on in reverse block order:
8628E664C59BBAA2 TDES Dec with 27F66D5244FF621E AA6F6120EDEB427F
gets 010002D4B69CD2C0 (decrypted block 1)
Ordering the decrypted blocks 1st to last we get:
HEX
010002D4B69CD2C0
C7617D0463316E85
3F9CB00FE2C5A355
6E9CE5A9B2E6DB89
14A6372CA7736703
6EFAADC02F02C4FB
76C6CFD8A59C0000
We can ignore the last two bytes because we know the MagnePrint data is actually 54
bytes long.
010002D4B69CD2C0C7617D0463316E853F9CB00FE2C5A3556E9CE5A9B2E6DB8914A6372C
A77367036EFAADC02F02C4FB76C6CFD8A59C0000
This is an accurate decryption of the MagnePrint data.
Encrypted Session ID (application didn't load, all zeroes)
21685F158B5C6BE0
As this is a simple eight byte block, we only need decrypt it with
the appropriate key:
21685F158B5C6BE0 TDES Dec with 27F66D5244FF621E AA6F6120EDEB427F