[Security] SET(Secure Electronic Transaction) components

□ SET(Secure Electronic Transaction) components

○ Cardholder : Customer to purchase goods by using card
○ Issuer : Institution that issues cards to cardholder
○ Merchant : Goods seller selling goods to the cardholder
○ Acquirer : Institution that performs account creation, card authorization, payment processing, etc.
○ PG(Payment Gateway)

- Payment processing system
- Merchant submits payment information of the cardholder to PG

○ CA(Certificate authority) : Institution that issues certificate to the SET components