DSS
Data Security Standards, as detailed by the Payment Credit Card Industry.
Payment Gateway
A payment gateway enables real time transactions to occur on your website, and links the payments to your merchant bank account. This means your website does not have to store the credit cards and become a target for hackers. Payment gateways will authorise payments instantly, and make your site much more secure.
PCI
Payment Card Industry.
SSL
Secure Sockets Layer. A browser encryption technology which ensures that credit card transactions are treated with a level of encryption so that interceptions in internet traffic cannot be easily interpreted with malicious intent.