3D Secure authentication, Cardholder redirection
In the event of enrolled card, the Merchant must redirect the holder to the URL of the authentication page exposed by the Issuing Bank.
After completing authentication, the holder will be redirected to the TermUrl and receive two
parameters: MD, authentication session identifier and PARes (Payer Authentication Response),
authentication encrypted outcome.
The PARes will have to be forwarded to Nexi for validation, decoding, and extraction of the values required to submit the authorisation request in full/half secure mode.