Why is 3D Secure mechanism not integrated into H-Sphere?
3D secure mechanism is based on secure code confirmation by a customer on the CC issuer side. So, customer interaction is needed to perform payments. Basically, standard merchant gateways are developed to perform recurrent operations not involving customer interaction and 3D Secure mechanism cannot work with the systems like that. On the other hand, most web payment systems implement 3D Secure on their own side. So, you can benefit from 3D secure mechanism by using web payment systems supported by H-Sphere.