Patent ID: 7481362

Claim:
A communication system comprising: a web-based information transmission/processing device that: generates visually encrypted image data that causes indication of a visually encrypted image in a portion of a predetermined area of an image being displayed, generates filter image data that causes indication of a filter image emitted in at least one color tone that makes said visually encrypted image visible in the other portion of said predetermined area of said image being displayed, generates information input image data, transmits said information input image data, and, upon receipt of collected information data concerning an information data required in the thus-transmitted information input image data, transmits said hidden image data and said filter image data; and a terminal device connected to said web-based information transmission/processing device via a telecommunication system, having: an information input image for allowing various required information data to be inputted thereinto; a display for displaying information input image data and other data to be displayed; and a controller that controls and processes information data; wherein said terminal device accesses said web-based information transmission/processing device on the basis of a URL inputted thereinto causing a predetermined information input image data to load into the terminal device from said web-based information transmission/processing device causing indication of said predetermined information input image data on said display and, upon an information data having been inputted thereinto in response to the information required by said information input image data, transmitting said information data to said web-based information transmission/processing device; and wherein said terminal device displays said visually encrypted image data and said filter image data on said display means, and said visually encrypted image is visually decrypted by overlaying the filter image over the visually encrypted image to provide information intended for particular communication purpose.