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dc.contributor.author Lee, Jinwoo -
dc.contributor.author Seo, Jae Woo -
dc.contributor.author Cho, Kookrae -
dc.contributor.author Lee, Pil Joong -
dc.contributor.author Yum, Dae Hyun -
dc.date.available 2017-08-10T08:17:02Z -
dc.date.created 2017-08-09 -
dc.date.issued 2017-03 -
dc.identifier.issn 1745-1361 -
dc.identifier.uri http://hdl.handle.net/20.500.11750/4231 -
dc.description.abstract The Android pattern unlock is a widely adopted graphical password system that requires a user to draw a secret pattern connecting points arranged in a grid. The theoretical security of pattern unlock can be defined by the number of possible patterns. However, only upper bounds of the number of patterns have been known except for 3×3 and 4×4 grids for which the exact number of patterns was found by brute-force enumeration. In this letter, we present the first lower bound by computing the minimum number of visible points from each point in various subgrids. © 2017 The Institute of Electronics, Information and Communication Engineers. -
dc.publisher Maruzen Co., Ltd. -
dc.title A Visibility-Based Lower Bound for Android Unlock Patterns -
dc.type Article -
dc.identifier.doi 10.1587/transinf.2016EDL8196 -
dc.identifier.scopusid 2-s2.0-85016113744 -
dc.identifier.bibliographicCitation IEICE Transactions on Information and Systems, v.E100D, no.3, pp.578 - 581 -
dc.subject.keywordAuthor user authentication -
dc.subject.keywordAuthor graphical password -
dc.subject.keywordAuthor Android unlock patterns -
dc.subject.keywordAuthor lower bound -
dc.subject.keywordPlus Android (Operating System) -
dc.subject.keywordPlus Android Unlock Patterns -
dc.subject.keywordPlus Authentication -
dc.subject.keywordPlus Brute Force -
dc.subject.keywordPlus Connecting Points -
dc.subject.keywordPlus Draw a Secrets -
dc.subject.keywordPlus Graphical Password -
dc.subject.keywordPlus Lower Bound -
dc.subject.keywordPlus Lower Boundandroid Unlock Patterns -
dc.subject.keywordPlus Lower Bounds -
dc.subject.keywordPlus Upper Bound -
dc.subject.keywordPlus User Authentication -
dc.citation.endPage 581 -
dc.citation.number 3 -
dc.citation.startPage 578 -
dc.citation.title IEICE Transactions on Information and Systems -
dc.citation.volume E100D -
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Division of Electronics & Information System 1. Journal Articles

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