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2. Tokenization (data security) - Wikipedia

   en.wikipedia.org/wiki/Tokenization_(data_security)

   If the surrogate value can be used in an unlimited fashion or even in a broadly applicable manner, the token value gains as much value as the real credit card number. In these cases, the token may be secured by a second dynamic token that is unique for each transaction and also associated to a specific payment card.

3. Controlled payment number - Wikipedia

   en.wikipedia.org/wiki/Controlled_payment_number

   A controlled payment number, disposable credit card or virtual credit card is an alias for a credit card number, with a limited number of transactions, and an expiration date between two and twelve months from the issue date. This "alias" number is indistinguishable from an ordinary credit card number, and the user's actual credit card number ...

4. TreasuryDirect - Wikipedia

   en.wikipedia.org/wiki/TreasuryDirect

   Treasury continued to offer book-entry sales via postal mail and telephone orders, calling that system Legacy TreasuryDirect to distinguish it from online TreasuryDirect accounts. [ 26 ] In 2006, TreasuryDirect added a " virtual keyboard " to its login system for entering a password.

5. Add, edit, or delete a payment method for AOL services

   help.aol.com/articles/update-your-payment-method

   If your card number has changed, you must add a new card. 1. Sign in to your My Account page. 2. Click My Wallet. 3. Click Payment Methods. 4. Click Add Credit or Debit Card. 5. Enter the new info. 6. Click Submit.

6. Credit card information: The basics you need to know - AOL

   www.aol.com/finance/credit-card-information...

   The following information can help you better understand the details of your credit card account and track your credit history: Credit limit Your credit limit is the amount of credit you’re ...

7. What is a credit privacy number? - AOL

   www.aol.com/finance/credit-privacy-number...

   Keeping old credit accounts open: Leaving a credit card account open increases the amount of available credit, which helps keep your credit utilization number in check. Plus, the account age is ...