Patent ID: 9706405
Date: 2017-07-11
CPC Classifications: G06Q,G08G,H04L,H04M,H04W

Claim:
1. A method for an authentication system performing online authentication of an online transaction between a mobile phone, associated with a user, and a payment system, via communication messages between the mobile phone and the payment system, the authentication system including at least one processor and authentication software running on the at least one processor to cause the at least one processor to perform the method, wherein the method comprises: preparing a transaction authentication communication message for the transaction to be sent to the mobile phone over at least one telecommunication network; randomly selecting a reply address from a multiplicity of reply addresses at which the online authentication system is capable of receiving reply communication messages from one or more mobile phones including the mobile phone; associating the randomly selected reply address as a reply address for the transaction authentication communication message; sending the transaction authentication communication message, including the randomly selected reply address, to the mobile phone over the at least one telecommunication network; receiving a reply communication message from the mobile phone over the at least one telecommunication network at the randomly selected reply address, the reply communication message having a sender address that is the user's subscriber number, Calling Line Identity (CLI), e-mail address or IP address associated with the mobile phone; and authenticating the transaction based on contents of the reply communication message, the sender address and the randomly selected reply address at which the reply communication message from the mobile phone is received by the online authentication system.