The signature on the printing paper is photographed to form a picture, and the handwritten signature is left in the electronic document by pasting the picture.

Handwritten signatures left in electronic documents have no legal effect.

Handwritten handwriting signature is input through electronic equipment, which will collect multi-dimensional behavior characteristic information such as strokes, stroke order, pen pressure, pen speed and signature time. In the writing process of the signer, a data packet is formed. After the collection is completed, the signature font has the function of handwriting recognition. The biometric information of the signature is extracted by algorithm, the cause of handwriting is traced by the principle of graphology, the handwriting trend and writing habits are analyzed, and intelligent comparison is made, which can effectively identify whether it is signed by the signer.