Anti-fraud eCommerce solutions firm ClearSale has announced that a new behavioural biometric tool will be added to its fraud protection service.The Mapper biometric toolkit uses real-time purchaser behaviour and historical data to analyse each individual order's risk of fraud, the firm noted in a statement.The factors include the amount of time it takes to enter customer, shipping, and payment data and a biometric comparison of the shopper's keyboard input and mouse movements to data from previous valid transactions by the same person.Mapper results contribute to the overall fraud score calculated by ClearSale's Total Guaranteed Protection service, which screens all domestic and cross-border ecommerce orders for fraud risk, manually reviews all high-risk orders, and gives merchants the final say on which orders to approve and deny.ClearSale is a Card-Not-Present (CNP) fraud prevention company that protects e-commerce merchants against chargebacks.