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Data Encryption
The scrambling of data so only the intended users can read and understand the encrypted information.
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DBA
Doing Business As - the name a business
uses to operate.
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DDA
Demand Deposit Account - a checking account.
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Debit Card
A bankcard used to purchase goods and services and to obtain cash, which debits the cardholder's personal checking
account. During online debit transactions, the cardholder must enter a PIN.
Learn more...
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Debit Switch
A portal that transmits debit data between gateway banks and debit card issuers - also referred to as "Debit Network."
Only financial institutions may be members of debit switches.
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Decline
A response from the card issuer denying the use of the card for the attempted transaction. If a request for approval is
declined, the merchant must ask the cardholder for another form of payment.
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Dial-Up Terminal
An authorization terminal that uses a telephone line to communicate with the authorization center.
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Digital Certificate
An encrypted attachment to an electronic message, used for security purposes. The most common use of a digital certificate
is to verify that a user sending a message is who he or she claims to be. The receiver is also provided with a way to encode
a reply.
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DIP Switches
Dual In-Line Package Switches - a series of
connected switches that determine the proper configuration for a payment card terminal printer.
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Direct Response
Term used to describe a merchant processing primarily non-face-to-face or card-not-present transactions.
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Discount Rate
The fees charged by the card acquirer to the merchant for processing payment card transactions.
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Display
The backlit panel on a payment card device that shows characters on the screen.
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Duality
The membership of a financial institution in both MasterCard and Visa associations.
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DUKPT
Derived Unique Key
Per Transaction - a method of PIN pad encryption.
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