Abstract:

The paper describes methods for detecting fake, unproperly created signatures collected by Signatures-gathering Person (SGP). The signatures were collected by a group of about 250 SGPs, who aimed to collect samples of 12 biometric signatures each from 110,000 people. Unfortunately, among them there were some who repeatedly tried to cheat the system by inserting fake signatures. This paper describes ways to verify that SGPs are collecting signatures honestly, by analyzing the biometrics of the signature and having the method checked by an expert called graphologist. Detecting these forgeries builds a lot of knowledge about the biometric signer's identity identifying algorithms and attempts to generate fake identities in the signature area.