Embodiments of the invention are related to a computer-implemented authentication method and system for authenticating a customer using an electronic device for engaging in a transaction involving a financial institution over a network. Embodiments of the method include capturing an image of the customer engaging in the transaction using an image capturing device integrated with the electronic device and retrieving a stored image of the customer from an authentication database. Embodiments of the invention additionally include comparing, using a comparison algorithm executed by computer processing components, the stored image with the captured image to authenticate the customer and upon authentication, monitoring the captured image during the transaction for an interruption using the computer processing components. The method further includes terminating the transaction if an interruption is detected.