A personal touch

A survey on touch dynamics authentication in mobile devices

“…Decision Making: Decision making is an operation carried out to determine if the touch dynamics data submitted by a user is indeed originated from the target user. This decision is made by comparing the similarity or dissimilarity score generated from a machine learning technique against a predefined threshold (Bo et al, 2014;Kolly et al, 2012). Before the final decision is made, a fusion approach may be applied to combine either the information from multiple features (Buschek et al, 2015;Jeanjaitrong and Bhattarakosol, 2013) or to combine the matching scores from different machine learning techniques (Samura et al, 2014), to increase accuracy performance.…”

“…Data acquisition may be conducted under two settings, (i) supervision with a stringent protocol or (ii) unmonitored without any restrictions. The papers by (Alotaibi et al, 2014;Johansen, 2012;Kolly et al, 2012;Samura et al, 2014) reported experiments that were carried out without any specific restrictions. A majority of experiments (89%) reported in literature were actually carried out under supervised and controlled environments.…”

“…A data acquisition operation could be a resource-intensive process that requires some dedication and efforts from the subjects. To increase the participation rate or the number of subjects taking part in an experiment, (Kolly et al, 2012) suggested that the data acquisition tools can be distributed via a mobile application store. This may be a possible way of recruiting a larger number of subjects, but, by doing so, control over the data acquisition operation will certainly become limited and the risk of data being tampered with or manipulated becomes higher.…”

“…However, it may be argued that the data acquired from a special group of population may not realistically represent the wider community. (Coakley et al, 2015;El-Abed et al, 2014;Kolly et al, 2012) are among the few pieces of work we were able to find in literature, which recruited subjects from a population with wide demography, e.g. people from dissimilar age groups and/or with different professions.…”

“…Meng et al, 2014), a random multi-touch gesture input (Sae-Bae et al, 2012), or touch input interactions with a common user interface element (e.g. buttons, checkboxes and sliders) (Kolly et al, 2012;Saravanan et al, 2014), made over a period of time. As most of the published touch dynamics experiments focused on the character-based or digit-based input, hereafter we shall focus our discussions on these two input types.…”