US Patent 9805182 Authentication using a client device and a mobile device

A technique authenticates a user to server equipment. The technique involves reading, by a mobile device, a visual pattern from a client device, the mobile device and the client device being separate and distinct and in possession of the user. The technique further involves includes generating, by the mobile device, a token message based on the visual pattern. The technique further involves providing, by the mobile device, the token message to the server equipment to authenticate the user to the server equipment.