Maestro Global Rules (PDF) - MasterCard

data encryption standard (DES)
Glossary
Glossary
A cryptographic algorithm adopted by the U.S. National Bureau of Standards
for data security. Encryption scrambles PINs and transaction data for safe
transmission.
debit card
A plastic card used to initiate a debit Transaction. In general, these Transactions
are used primarily to purchase goods and services and to obtain cash, for which
the Cardholder's asset Account is debited by the Issuer.
Debit MasterCard card
A card bearing the MasterCard mark issued by a MasterCard International
customer or affiliate which provides access to a cardholder deposit account for
making purchases or withdrawing cash.
decline
Authorization response whereby the Issuer (or its agent) has refused to
authorize the Transaction.
digital wallet
See remote wallet.
downtime
The period during which computer or network resources are unavailable to
users because of a failure or normal downtime maintenance.
dual currency environment
A country, territory or zone in which two (2) currencies with different
denominations coexist as legal currency.
dynamic data authentication (DDA)
An offline Card authentication technique in which the Chip Card and the
Terminal must be active and capable of executing a public key algorithm. This
process produces a unique digital signature for each authentication attempt
thereby eliminating the possibility of replay.
dynamic stand-in authorization
Where allowed by a Region, authorization given by the Interchange System
on behalf of the Issuer and at the Issuer’s risk, according to a number of risk
parameters specified by the Issuer. It is activated dynamically, for example if
the Issuer is unavailable due to network failure or if the authorization response
comes too late or not at all.
©1993–2012 MasterCard. Proprietary. All rights reserved.
Maestro Global Rules • 9 November 2012 E-5