[gsharma]

Unfortunately, not too many buyers read things long pieces of text.

Usually things like SSL (the lock in the browser from a user's perspective), trusted seals from well known companies and logos from trusted brands (Visa, Mastercard, etc.) makes users feel a lot more secure than the description or details about the security.

Amazon's Sign In button has text "Sign in using our secure server." You might want to look at some of the leading companies for best practices to create a secure environment for the buyers.