6 - Magnetic Stripe Card Data Sent from Device to Host (MSR Only | Keypad Entry Only)
eDynamo| Secure Card Reader Authenticator | Programmer’s Manual (COMMANDS)
Page 40 of 245 (D998200115-17)
The remaining characters (0s, 4s, and 6) are Discretionary Data. For swiped debit / credit cards this
data is of varying length and content and comes from the card, and must be interpreted according to
the standards established by issuers, payment brands, and so on.
o The string of 4s is the CVV2 a cardholder or operator entered on the keypad. This may be 3
or 4 characters long and is not padded, so the host software must find it by using the fixed-
length padding and sentinels that surround it.
o The strings of 0s are literals of fixed length: Track 1 has three zeroes after the Service Code,
and five zeroes after the CVV2; Track 2 has three zeroes after the Service Code, and two
zeroes after CVV2.
o The 6 contains either a 0 or a 1.
To Next Page
Loading...
