I have forgotten my security code that I need when I purchase itunes. Is there any way to retrieve it?

What "security code" are you referring to? Do you mean the security questions?

http://support.apple.com/kb/HT5665

Or are you referrring to the two-step security authorization?

http://support.apple.com/kb/ht5570

That would indeed the security code on the back of the credit card. You will need the card in hand to get that code.

mine is referring to the security questions.