Method for tap-proof transmission of character string from client to server through computer network, involves producing shadow image on screen through server according to visual cryptography process

摘要

The method involves producing a shadow image on a screen through a server according to visual cryptography process. An image with pushbutton is produced and marked corresponding to the random principle with characters, by the server. An input of string of characters on the marked pushbutton is realized by the client through mouse clicks to reconstruct the character string entered from the client over a server. Independent claims are also included for the following: (1) a computer program for executing the method (2) a plastic or paper screen for executing the method.