Topspin's purchase experience is and always has been done via SSL, the leading standard for securing online transactions. The purchase flow has the SSL icon to denote that the purchase is secure. 

The reason we can't display an SSL icon in the browser navigation bar is because Topspin integrate's into an artist's site as an iframe. This allows each artist to maintain a consistent branding, but if you right-click and select "frame info," you'll see that you're shopping securely. 

Topspin submits to regular audits from a card processing authority, and we never store or process customers' raw credit card data; instead, we use a partner (GlobalCollect) whose specialty is card security. All credit card data is sent encrypted to GlobalCollect.

Most artists do offer PayPal as an alternative to using a credit card, which you may feel more comfortable doing.