Signature analysis in the context of mobile devices

Handwritten signature is one of the oldest means of the human being to both authenticate him/herself and state that a certain document has been understood and accepted. In the modern world, this biometric modality was translated to the use of peripheral pads that allow the signature to be performed by the user. However, in the recent years, the proliferation of mobile devices with touch screens has paved the path to deploy this biometric modality beyond the limits of a desktop. Bringing this biometric modality to mobile devices open several challenges, being some of them already covered, but some others needing further study. This paper provides an overview of these challenges and point to future research works that can help to the continuous deployment of this biometric modality.