"Credit card safety
CD WOW! and our secure payment service providers use the latest technology to protect your credit card information and do not release it to any outside organization. You can place your orders using secure encryption (the Internet standard for secure transactions). Any losses sustained by the transmission of personal information by e-mail or Internet links shall be borne exclusively by you.
If policy changes are substantial, we will notify our customers via e-mail. "
Found at the Terms and Conditions page click here
You will probably find it will redirect you to a secure page when it comes to actually submitting the data