The Sun Internet Services Secure Payment System is a complete system for conducting financial transactions on the Internet.

Sun Internet Services software offers two methods for authorizing consumer purchases and actually billing the consumer's credit card: online capturing and, post-authorization capturing.

They break down like this:
Online Capture:

• With online capturing, transactions are captured and charged to the consumer's credit card as soon as they are authorized.
  
• Post-Authorization Capture: With post-authorization capturing, we use the Cyber's administrative server to capture individual transactions using a post-authorization message that is sent to the processing bank. This message tells the bank to capture the transaction and charge the transaction to the consumer's credit card.