面向智能手机的自适应触屏持续认证方案

An Adaptive Touchscreen Based Continuous Authentication Scheme for Smart Phones

近年来,智能手机的触屏认证受到了广泛的关注.现有的认证方案在受外界环境影响时认证能力会下降,为提高认证的稳定性和安全性,本文对基于触屏时触控传感器行为和运动传感器行为的双模态认证进行了研究.然而,双模态认证系统复杂度增加且会带来大量的资源消耗,因此,本文提出一种自适应触屏持续认证方案.其可根据上下文参数自适应地选择不同强度的认证策略,达到了降低认证系统复杂度以及能耗的目的,实验表明该方案在提供足够设备安全性的同时使能耗降低50%以上.

Touchscreen-based authentication has received widespread attention for smart phone.Since the existing authentication schemes are vulnerable to the external environment,we mainly study the dual-modal authentication including touch sensor behavior and motion sensor behavior when touching the screen,so as to improve the security of authentication.However,the complexity of the dual-modal authentication system increases;and will bring a lot of CPU(Central Processing Unit)resources and power consumption.Therefore,we propose an adaptive touch screen continuous authentication method,which can adaptively select the authentication strength according to the context,and reduce the complexity and energy consumption of the authentication system by avoiding the use of motion sensor behavior authentication when the touch screen is used.And experiments show that the method can reduce energy consumption by more than 50%while providing sufficient smartphone safety.