A Secured Digital Handwritten Signature Prototype for Visually Impaired People

Abstract

No doubt, Visually Impaired (VI) have trouble signing documents. They cannot identify their signatures and have their identification verified. Hence, some people may impersonate their identity. They may imitate their signatures in formal documents like contracts, money checks, and other vital documents, mainly in the governmental institutions. No clarified method can maintain these signatures. This paper presents a new prototype for securing VI people's signature using encryption techniques and data hiding methods. The proposed prototype uses the Least Significant Bit (LSB) algorithm for hiding some information, including the name of VI, the date, and the time of the signature. These data are encrypted using an improved, chaotic algorithm with a linear feedback shift register approach. Moreover, a QR code for each VI person is created and associated with the document. Both the signature and the QR code can be used to secure and validate the VI signature for a given document. A real signature dataset is constructed for evaluating the proposed prototype. The experimental results with respect to the real dataset and the Spanish signature dataset (MCYT-100) proved that the superiority of the proposed prototype.