iDEAL offers merchants a real-time payment method (publicized as low-cost and virtually risk-free) to accept internet payments. For customers, iDEAL uses the same environment as their banks' online banking sites. A high level of security is realized by using two-factor authentication (2FA), such as a challenge-response token based on the chip embedded in the debit card or ATM card. Furthermore, no sensitive information is being shared with the merchant, such as credit card numbers. There is no chargeback right however, which can be considered a disadvantage for the consumer using this payment method. This is considered a advantage to the merchants.
iDEAL works as follows:
Merchant offers iDEAL as payment method, often in addition to the regular credit card payment options
Consumer selects iDEAL and selects his bank
Consumer is redirected to his bank's login page
Participating bank displays transaction data
Customer enters account number and signs the transaction digitally using a 2FA token
Bank authorizes transaction in real-time, deducting the amount directly from the consumer's account (if there is not enough balance, the transaction will be refused)
Merchant received real-time confirmation of the payment by the bank
Consumer is redirected back to the merchant page with a confirmation that the payment has been successful