The technology used for online payment processing typically includes payment gateways, which facilitate the secure transfer of payment information between the customer, merchant, and financial institutions. These gateways encrypt sensitive data to protect it during transactions, ensuring compliance with security standards like PCI DSS. Additionally, payment processors manage the actual transaction, authorizing the transfer of funds. Various methods like credit cards, digital wallets, and direct bank transfers can be integrated into the online payment system, providing customers with a range of options to complete their purchases conveniently and securely.