Verified By Visa & Secured By Mastercard are systems that offer an addition layer of authentication through use of a password. Card Holders can optionally choose to enable this extra layer or protection on their cards by choosing a password and an e-commerce site can choose to ask for a password for cards that have this extra layer of protection enables. The huge advantage of this feature is that if you enable this feature on your e-commerce store in almost all cases chargebacks are covered by the credit cards companies themselves even if a cardholder wasn’t enrolled in this program.