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覗き見攻撃耐性を考慮したスマートフォンにおける個人認証方式の検討 A personal authentication method for smartphone against shoulder surfing 市村, 亮太 Ichimura, Ryota 野口, 敦弘 Noguchi, Atsuhiro 納富, 一宏 Notomi, Kazuhiro 斎藤, 恵一 Saito, Keiichi personal authentication shoulder surfing smartphone security and paired comparison application/pdf In this article, we discussed features of resistant for shoulder-surfing attack on smartphone at the time of PIN code inputting. Generally, smartphone is not safe for shoulder-surfing attack, because it has large screen and operational movements of fingers are shown on the touch panel. Therefore we propose a personal authentication method and an interface against shoulder-surfing attack for smartphone. The proposed method has 3 features to defend shoulder-surfing attacks as following: 1) variable alignment of ten keys on 5x6 key matrix, 2) control of constraint display time and 3) dummy keys contained in key matrix. Using proposed interface, we experimented 20 subjects to compare our method from usual PIN code input method. Then the result of the experiment showed that proposed method can decrease more than 70% success rate ofshoulder-surfmg attacks. Therefore our method is available for secure logon to smartphone using PIN code. departmental bulletin paper 神奈川工科大学 2013-03-20 VoR application/pdf 神奈川工科大学研究報告.B,理工学編 37 53 58 AN10074179 09161902 https://kait.repo.nii.ac.jp/record/1102/files/kkb-037-011.pdf https://doi.org/10.34411/00001095 http://hdl.handle.net/10368/31844 https://kait.repo.nii.ac.jp/records/1102 jpn