Computer software for identifying personal signatures can not only identify the signer's handwriting, but also identify some characteristics, such as the strength of the pen, the speed of signature and so on. Computer software for identifying personal signatures can not only identify the signer's handwriting, but also identify some characteristics, such as the strength of the pen, the speed of signature and so on. Even the forgers who are best at imitation cannot completely copy these features. This software can be used to verify the authenticity of the signature.