SECURITY SCHEMES FOR ELECTRONIC PAPER DISPLAY DEVICES

A display device comprises an electronic paper display, a security module, an input for receiving content for display on the electronic paper display and a processing element. The security module is arranged to store and/or generate a value that is periodically updated and to communicate the value to a proximate device. A proposed update to the displayed content is accompanied by a further value which is verified by the security module or by a remote content service before updating the content displayed on the electronic paper display. 种显示设备包括电子纸显示器、安全模块、用于接收用于在电子纸显示器上显示的内容的输入以及处理元件。安全模块被布置成存储和/或生成周期性更新的值并且将值传送到接近度设备。对所显示的内容的建议更新随附另个值，该另个值在更新在电子纸显示器上显示的内容之前被安全模块或远程内容服务验证。