3D Secure is a service that prevents credit card fraud in Internet-based transactions. Cardholders must input a password when making the transaction to authenticate their identity.
3D JService and 3D JMerchant are proxy services for VISA's authentication service, which is designed to make credit card transactions on the Net safer, as well as for MasterCard's Secure Code and JCB's J/Secure net authentication (3D Secure) services. These services reduce the risk of losses from fraudulent credit card usage by authenticating cardholders during online shopping and other 'Net transactions.