All transaction information passed between merchant sites and the Payment Gateway Systems are encrypted using 128-bit SSL certificates. No cardholder information is ever passed unencrypted and any messages sent to our servers from our payment gateway providers and are signed using MD5 hashing to prevent tampering. Our Customers are secure in the knowledge that nothing they pass to the the payment gateway servers can be examined, used or modified by any third parties attempting to gain access to sensitive information.
Once on our systems, all sensitive data is secured using the same internationally recognised 256-bit encryption standards used by, among others, the US Government. The encryption keys are held on state-of-the-art, tamper proof systems in the same family as those used to secure VeriSign's Global Root certificate, making them all but impossible to extract. The data we hold is extremely secure and we are regularly audited by the banks and banking authorities to ensure it remains so.
The payment gateway has multiple private links into the banking network that are completely separate from the Internet and which do not cross any publicly accessible networks. Any cardholder information sent to the banks and any authorisation message coming back is secure and cannot be tampered with.
No individuals within our payment gateway suppliers are able to decrypt transaction information or cardholder data. Our systems only allow access to our most senior staff and only in extenuating circumstances (such as investigations of Card Fraud by the Police). Your transaction information and customer card information is secure even form our own employees because our systems never display the full card numbers, even on administration screens.