Your payments, whether made through Credit Card, Cash or Check are handled by a trusted third-party e-commerce solution called PLIMUS. They have taken orders of literally millions of customers worldwide. You can checkout their website and privacy policy.
PLIMUS obtains your Credit Card information on secure SSL (Secure Socket Layer) connection with a MSIE Lock or Netscape Blue Key icon on the status bar of the browser, which is designed to provide government level security for your credit card transactions. Which means no one can intercept your payment information while you are making an order.
With today's encryption technology, sending your credit card number to a Secure Server over the Internet is as safe as using your credit card in a restaurant, or placing an order over the telephone.