AUTHENTICATION METHODS AND SYSTEMS

摘要

A method of generating an authentication token using a cryptographic based application downloaded to a mobile telephony device and a method of authenticating an online transaction using such a token. The method may be employed in a two factor authentication method uitilising a user password and an authentication token. The method allows a two factor authentication method to be provided by a wide range of mobile telephony devices operating either online or offline. Other authentication systems and methods of authentication are also disclosed.