The CRC-16 checksum of the EMV public key.
This property specifies the 4 character CRC-16 checksum of the EMV public key. This is a hexadecimal value representation of two bytes, for instance "AA02".
This property should be set to the checksum of the current public key before calling CheckForUpdate. If no previous key has been downloaded leave this setting empty.
This property is only applicable when Platform is set to FDMS Rapid Connect.