Abstract: An authentication sever (108) to authenticate real time a transaction associated with an electronic card performed by a user 102 subscribed to an authentication service having a user subscription database (202) on the authentication server 108 is provided. The authentication server (108) executes including obtaining a confirmation that the user (102) is subscribed to the authentication service, generating a verification code real time triggered by the transaction associated with the electronic card, communicating the verification code to a mobile communication device (104 A-B) associated with the user, processing a verification message based on the verification code and a mobile communication device information associated with the mobile communication device (104 A-B), and authenticating the transaction if the verification message and the mobile communication device information matches an information associated with the user subscription database.