The Globcoin prepaid Mastercard is fully 3-D Secure, and all purchases you make online with your Globcoin card have an extra security step involved. When you’re shopping online, an additional pop up box will ask you for a password. This password will be sent automatically by SMS to the mobile phone number linked to your Globcoin card. It is a ‘one time password’ (OTP) that means it’s only valid for the specific transaction you are making. You enter that password in the pop up box and complete your online transaction.