Editing Secure Electronic Transaction (section)

===How it works===
Both cardholders and merchants must register with the CA (certificate authority) first, before they can buy or sell on the Internet. Once registration is done, cardholder and merchant can start to do transactions, which involve nine basic steps in this protocol, which is simplified.
# Customer browses the website and decides on what to purchase
# Customer sends order and payment information, which includes two parts in one message:
#:a. Purchase order – this part is for merchant
#:b. Card information – this part is for merchant’s bank only.
# Merchant forwards card information to their bank
# Merchant’s bank checks with the issuer for payment authorization
# Issuer sends authorization to the merchant’s bank
# Merchant’s bank sends authorization to the merchant 
# Merchant completes the order and sends confirmation to the customer
# Merchant captures the transaction from their bank
# Issuer prints credit card bill (invoice) to the customer