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NEO 2 Interface Developer’s Guide
Copyright © 2019, International Technologies & Systems Corporation. All rights reserved.
103
6.1.3.
Torn Transaction Recovery
A method exists for saving data from a torn transaction and matching up that transaction with
a card that re-appears in the field to complete the transaction. Due to space limitations, a
reader can retain a maximum number of two torn transaction records. New tags (configurable
in a PayPass Group) control the size and use of the torn transaction log:
Tag
Name
Description
DF811C
Max Lifetime of Torn
Transaction Record
Controls how long a torn transaction
record can exist in the log before it
expires. It is expressed in seconds.
DF811D
Maximum Number of Torn
Transaction Records
The only possible values are 0, 1, or 2. If
this tag is set to 0, then the torn
transaction recovery is effectively
disabled.
These tags are configurable for PayPass groups. It they are configured for other groups,
they will not be used.
6.1.4.
EMV Certificate Revocation List
The MasterCard application can make use of the EMV Certificate Revocation List features if
they are enabled. The DF26 tag is used to enable or disable the Certificate Revocation List
function. The default value for this tag is “enabled” (1).
6.1.5.
Stop Transaction Command
M/Chip 3.02 includes a
Stop Transaction
command that functions similar to a
Cancel
command. The DF68 tag is used to enable or disable the
Stop
command. The default value for
this tag is “disabled” (0).
6.1.6.
Proprietary Tag List
The proprietary tag list feature is not specific to MasterCard. Refer to the
6.1.7.
PayPass Personalization Limits
To guarantee the successful completion of PayPass transactions using CDA or SDA, size
restrictions noted in this section apply.
6.1.7.1.
CDA Transactions
The combined length of the following data objects personalized to the card cannot exceed
2400 bytes.
•
ICC public key certificate
•
ICC public key exponent
•
ICC public key remainder
•
Static data used in data authentication (2048 bytes maximum)