Abstract: Systems and methods for watermarking content and authenticating watermarked content are provided. Content is rendered on a display while watermarking information embedded in portions of the content are obtained. The watermarking information is verified to authenticate the content. If the content is not authentic, or is not authenticated within a period of time, the content can be terminated or otherwise blocked from rendering on the display.

Abstract: A gasoline service station includes gasoline dispensers and a PIN pad including keypads for receiving personal identification numbers and assembled into a network for securely communicating personal identification numbers from the PIN pads and dispensers to a host computer over unsecured data lines. The PIN pads and dispensers each include means for encryption and outputting of personal identification numbers. A security module includes means for decryption of data associated with each PIN pad and dispenser in a process for the respective PIN pads and dispensers and means for encryption of data associated with the host computer in a process which is different from its decryption of data associated with the PIN pads and dispensers.

Abstract: A vapor recovery fuel dispenser includes a liquid fuel pump for pumping and blending liquid fuels from fuel reservoirs along a fuel delivery line to an outlet. A vapor pump returns fuel vapors from proximate the outlet along a vapor return line to a repository. An electric motor drives the pump in response to a signal. An electrically-activatable valve is provided in the vapor return line. A first sensor generates a first pulse train representative of the flow rate of the liquid fuel pump and a second sensor generates a second pulse train representative of the flow rate of the vapor pump.A controller is operably interposed between the liquid fuel pumps and the vapor pump. The controller monitors whether the liquid pumps are operating, whether the vapor pump motor is operating, and the electrical current to the vapor pump motor. It also outputs an electrical signal to open the valve when the motor or liquid fuel pump is operating and to close the valve when motor operation or liquid pumping is not detected.