Hill-Climbing Attacks and Robust Online Signature Verification Algorithm against Hill-Climbing Attacks


IEICE TRANSACTIONS on Information and Systems   Vol.E93-D   No.3   pp.448-457
Publication Date: 2010/03/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E93.D.448
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Section on Trust, Security and Privacy for Pervasive Applications)
hill-climbing attack,  online signature verification,  biometrics,  vulnerability,  offline attack,  

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Attacks using hill-climbing methods have been reported as a vulnerability of biometric authentication systems. In this paper, we propose a robust online signature verification algorithm against such attacks. Specifically, the attack considered in this paper is a hill-climbing forged data attack. Artificial forgeries are generated offline by using the hill-climbing method, and the forgeries are input to a target system to be attacked. In this paper, we analyze the menace of hill-climbing forged data attacks using six types of hill-climbing forged data and propose a robust algorithm by incorporating the hill-climbing method into an online signature verification algorithm. Experiments to evaluate the proposed system were performed using a public online signature database. The proposed algorithm showed improved performance against this kind of attack.