使用图形密码进行身份验证:容忍和映像选择的影响

S. Wiedenbeck, J. Waters, J. Birget, A. Brodskiy, N. Memon
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引用次数: 403

摘要

图形密码是字母数字密码的另一种选择,用户单击图像来验证自己,而不是键入字母数字字符串。我们已经开发了一个这样的系统,叫做paspoints,并对人类用户进行了评估。在图形密码的可记忆性方面,评价结果是有希望的。在这项研究中,我们通过研究两个问题来扩展我们的人为因素测试:在点击密码点时的容差或误差范围的影响以及密码系统中使用的图像的影响。在我们的容差研究中,结果表明,当在用户的密码点周围使用小容差(10 x 10像素)时,密码的准确记忆会大大降低。这可能是因为用户没有以一种精确的方式在内存中编码密码点,而这种方式是在一段时间内记住密码所必需的。在我们的图像研究中,我们比较了用户在四个日常图像上的表现。结果表明,图像的性能差异不大。这一初步结果表明,许多图像可能支持图形密码系统的可记忆性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Authentication using graphical passwords: effects of tolerance and image choice
Graphical passwords are an alternative to alphanumeric passwords in which users click on images to authenticate themselves rather than type alphanumeric strings. We have developed one such system, called PassPoints, and evaluated it with human users. The results of the evaluation were promising with respect to rmemorability of the graphical password. In this study we expand our human factors testing by studying two issues: the effect of tolerance, or margin of error, in clicking on the password points and the effect of the image used in the password system. In our tolerance study, results show that accurate memory for the password is strongly reduced when using a small tolerance (10 x 10 pixels) around the user's password points. This may occur because users fail to encode the password points in memory in the precise manner that is necessary to remember the password over a lapse of time. In our image study we compared user performance on four everyday images. The results indicate that there were few significant differences in performance of the images. This preliminary result suggests that many images may support memorability in graphical password systems.
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