Holographic signature is probably one of the most ancient ways to authenticate and express their will, for example in constitutions and marriages. Even before other modern methods were invented, signatures were already culturally accepted and understood.[1]
Before starting with technical details, it is important to make it clear the difference between validation and authentication. Validation verifies that the information provided matches previously recorded data. Authentication checks identity against certain previously declared biographic information. It mainly verifies the identity that the person declares; it does not infer identity from current data.
There are several approaches to verify identity, including iris and fingerprint scanning. However handwriting is still the most prevalent and natural way to do it. Common security and validation approaches include the ones depicted in table I.
TABLE I
MAIN BIOMETRIC TECHNOLOGIES
From the table, is simple to observe that high accuracy is often in invasive approaches cases and at a high cost. Signature approach is non-invasive, and the rate of false positives is lower than using other fingerprint techniques [3][4]. As a consequence, it is a good option to perform a quick and easy light validation. Furthermore, validation is a faster process than identification. For this reason, it is more commonly used.
Trevathan, J. and McCabe, A. Remote Handwritten Signature Authentication. In Proceedings of the 2nd
http://biometrics.pbworks.com/w/page/14811349/Advantages-and-disadvantages-of-technologies
Gupta, J and McCabe, A. A Review of Dynamic Handwritten Signature Verification . James Cook University, Australia(1997).
Validación de Firmas Ológrafas by Tamara D. Blum, Ariel J. Sztern and Daniela López De Luise, Universidad de Palermo, AI-Group.
Daniela López De Luise