Signature Verification

1. Signature Verification By Mayura Worlikar COSC 5010

2. Introduction • Computers are largely used in almost each and every field including financial transactions, thus providing additional security measures for computer system is necessary. • The security measures to be used must be cheap, reliable and un-intrusive to the authorized person. The technique which meets these requirements is handwritten signature verification.

3. Why Handwritten Signature only? • Everyday transaction • Individuals less likely to object • Individual’s signature is unique • Less controversial

4. Categories of signature Identification • Offline Signature Verification • deals with shape only • Online signature Verification • deals with dynamic features like speed, pen pressure, directions, stroke length, and when the pen is lifted from the paper

5. Challenging task • The main challenge with online Signature Identification technology is differentiating between the consistent parts of the signature and the behavioral parts of the signature that vary with each signing . A person’s signature is never entirely the same. The signature can vary substantially over an individual’s lifetime. Allowing for these variations while providing protection against forgers is a challenging task.

6. Some theory • Signature Acquisition • Signature Identification using global features • average pressure • pen tilt • average velocity • Number of pen ups • Training

7. Signature Identification

8. Advantages • Low error rate. • Forgery is detected even when the forger has managed to get a copy of the authentic signature. • Fast and simple training. • Cheap hardware. • Little storage requirements.

9. References • http://www.gaits.com/biometrics_signature.asp • http://www.vision.caltech.edu/mariomu/research/sigverif/ • Dynamic Signature Verification using Local and Global Features ------ By Charles Pippin