A Consideration on Improvement of Authentication Success Rate for the User Authentication Method for Touch Screen Devices SWIPASS

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  • タッチスクリーン端末向け認証方式SWIPASSにおける認証成功率向上のための検討
  • タッチスクリーン タンマツ ムケ ニンショウ ホウシキ SWIPASS ニ オケル ニンショウ セイコウリツ コウジョウ ノ タメ ノ ケントウ

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Abstract

Users of smartphones and/or tablet computers browse and download confidential document files routinely. Therefore, the higher security level is needed for smartphones and tablet computers than conventional mobile phones (feature phones). From this kind of background, an image-based user authentication method for touch screen devices by using images shot by user oneself and gotten from the WEB, called SWIPASS, has been proposed. SWIPASS has resistance to observation attack, recording attack, and smudge attack, the most serious threats for touch screen devices. However, there is an issue such that when there exist images similar to the pass image in the terminal, legitimate users do not authenticate properly because they cannot recognize the pass image accurately. Then, in this study, we propose a method to eliminate images whose likelihood of being recognized as the pass image wrongly are high from candidates to be displayed as a decoy image. We moreover conduct an experiment to verify the effectiveness of the proposed method.

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