Stop to unlock - improving the security of unlock patterns on mobile devices / by Alexander Suchan
Verfasser / Verfasserin Suchan, Alexander
Begutachter / BegutachterinKrombholz-Reindl, Katharina ; Weippl, Edgar
ErschienenWien, 2018
Umfangix, 64 Blätter : Diagramme
HochschulschriftTechnische Universität Wien, Diplomarbeit, 2018
Schlagwörter (EN)unlock pattern / mobile devices / security evaluation / usability metrics / entropy / user study / authentication
URNurn:nbn:at:at-ubtuw:1-108331 Persistent Identifier (URN)
 Das Werk ist frei verfügbar
Stop to unlock - improving the security of unlock patterns on mobile devices [0.85 mb]
Zusammenfassung (Englisch)

In this master thesis, we propose a security improvement for traditional unlock patterns as found in modern off-the-shelf smartphones. With our StopUnlock Patterns we propose to add a stop component which lets users define nodes where they deliberately stop for a limited amount of time before swiping to the next node of their unlock pattern. We argue that this stop component lets users select higher entropy patterns with only a minimal impact on usability metrics (such as authentication time and error rate) in comparison to simply increasing the length of the pattern. To evaluate StopUnlock Patterns, we conducted a lab study (n=40), a field study (n=14) and a security evaluation. Our findings suggest that StopUnlock Patterns (i) are easy to use, (ii) are memorable, and (iii) improve security.

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