AUTHENTICATION METHOD AND SYSTEM

摘要

There is disclosed a system and method for authenticating a transaction conducted by electronic messaging between a client device having an associated client device address and a host that provides messaging services for a plurality of clients, the method comprising a) sending a first message from the client device to the host; b) generating a public key in response to the first message; c) associating the public key with the client device address; d) sending a message from the host to the device address, the message containing the public key; e) sending a second message from the client device to the host, the message including the public key; f) comparing the public key and client device address of the second message with the public key and client device address of step c).