Most current on-line signature verification systems are pen-based,
i.e., the signature is written by a pen on a digital tablet. To
apply signature verification techniques to Internet applications,
one desirable way is to use mouse as the input device. In this
paper, a mouse based on-line signature verification system is
presented. The signature data is represented in a compact and
secure way. The enrollment is convenient for users and the
verification can be real-time. The system architecture is a simple
client-server structure that suits the common internet
applications. The client side posts a sequence of X*Y to the
server. That is, the raw signature sequence [X,Y] is
represented by X+Y(dot sum of the X-, Y-coordinate
sequences). Experimental results show that X+Yis effective for
verification. Even if the sequence X+Y is intercepted during
transmission over the Internet, original shape of signature [X,
Y] can be recovered. To make the system easy to implement, the
client side does nothing complex except posting X+Yto the
server. The server side preprocesses the sequence and saves it to
database during enrollment or match it against the claimed
template during verification. The matching technique adopted here
is the similarity measure ER2. Simulation results show that the mouse based verification system is reliable and secure for internet applications.
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