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Signature Verification Using Critical Segments for Securing Mobile Transactions
IEEE Transactions on Mobile Computing ( IF 7.9 ) Pub Date : 2020-03-01 , DOI: 10.1109/tmc.2019.2897657
Yanzhi Ren , Chen Wang , Yingying Chen , Mooi Choo Chuah , Jie Yang

The explosive usage of mobile devices enables conducting electronic transactions involving direct signature on such devices. Thus, user signature verification becomes critical to ensure the success deployment of online transactions such as approving legal documents and authenticating financial transactions. Existing approaches mainly focus on user verification targeting the unlocking of mobile devices or performing continuous verification based on a user's behavioral traits. Few studies provide efficient real-time user signature verification. In this work, we propose a critical segment based online signature verification system to secure mobile transactions on multi-touch mobile devices. Our system identifies and exploits the segments which remain invariant within a user's signature to capture the intrinsic signing behavior embedded in each user's signature. Our system extracts useful features from a user's signature that describe both the geometric layout of the signature as well as behavioral and physiological characteristics in the user's signing process. Given the input signatures for user enrollment, our system further designs a quality score to identify the problematic signature sets to achieve robust user signature profile construction. Moreover, we develop the signature normalization and interpolation methods to achieve robust signature verification in the presence of signature geometric distortions caused by different writing sizes, orientations and locations on touch screens. Our experimental evaluation of 25 subjects over six months time period shows that our system is highly accurate in provide signature verification and robust to signature forging attacks.

中文翻译:

使用关键段进行签名验证以保护移动交易

移动设备的爆炸性使用使得在此类设备上进行涉及直接签名的电子交易成为可能。因此,用户签名验证对于确保在线交易的成功部署变得至关重要,例如批准法律文件和验证金融交易。现有的方法主要侧重于针对移动设备解锁或基于用户行为特征进行持续验证的用户验证。很少有研究提供有效的实时用户签名验证。在这项工作中,我们提出了一个基于关键部分的在线签名验证系统,以保护多点触控移动设备上的移动交易。我们的系统识别并利用在用户内保持不变的段 s 签名以捕获嵌入在每个用户签名中的内在签名行为。我们的系统从用户签名中提取有用的特征,这些特征描述了签名的几何布局以及用户签名过程中的行为和生理特征。给定用户注册的输入签名,我们的系统进一步设计了一个质量分数来识别有问题的签名集,以实现稳健的用户签名配置文件构建。此外,我们开发了签名归一化和插值方法,以在存在由触摸屏上不同的书写大小、方向和位置引起的签名几何失真的情况下实现稳健的签名验证。
更新日期:2020-03-01
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