Method for generating a signed electronic document with an anti-tamper function

A method for generating a signed electronic document with an anti-tamper function, the method to be implemented by a network server communicable with an electronic device, the electronic device including a touch screen and an image capturing module, the electronic device executing an application program to load an original document and to display the original document on the touch screen, said method comprising:

• receiving, by the network server from the electronic device, input information that is associated with a handwritten signature inputted by a signer on the original document via the touch screen, and a dynamic image that is captured by the image capturing module and that is associated with a motion of the signer during input of the handwritten signature;
• compiling, by the network server, a signed document based on the original document, the input information and the dynamic image;
• generating, by the network server, an authentication value based on a first location where the handwritten signature is rendered on the signed document and a second location where the dynamic image is rendered on the signed document, wherein the first location is different from the second location;
• incorporating, by the network server, the authentication value into the signed document to result in an anti-tamper document;
• and
• transmitting, by the network server, the anti-tamper document to the electronic device to enable the electronic device to display, via the touch screen, the anti-tamper document which contains the handwritten signature and the dynamic image presented thereon.