A Proposal of New Reading Text CAPTCHA using Random Dot Patterns
A Proposal of New Reading Text CAPTCHA using Random Dot Patterns
复制标题
使用随机点图案的新阅读文本验证码的提案
DOI：
10.1109/candar.2018.00036
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Okazaki Naonobu
中科院分区：
文献类型：
--
作者：
Yamaba Hisaaki;Usuzaki Shotaro;Aburada Kentaro;Mukunoki Masayuki;Park Mirang;Okazaki Naonobu
随着被称为机器人的恶意程序所造成的麻烦的增长，CAPTCHA(区分计算机和人类的全自动公共图灵测试)在当前的信息社会中变得越来越重要。Captcha通过要求一些人类容易解决但机器人很难解决的问题来识别机器人和合法的人类用户。然而，计算技术的进步，如光学字符识别(OCR)功能。机器人逐渐能够解决目前的验证码问题。为了制造出这样麻烦的机器人，需要更复杂的验证码，这需要人类的高度认知能力。在本文中，我们提出了一种新的使用随机点图案的验证码方案。人类可以从由另一个随机点图案填充的背景中识别出由随机点图案填充的运动图形；然而，当图形暂停时，他们会丢失背景中的图形。由于计算机程序的图像识别通常是逐帧进行的，因此机器人很难从另一个随机点图案背景中识别出由随机点图案填充的运动图形。所提出的验证码方案利用了随机点图案的这一特性。这个验证码要求用户回答一个由随机点图案填充的文本，该文本在背景上移动，也由另一个随机点图案填充。使用典型的图像识别方法进行了多次实验，验证了所提出的验证码方案具有足够的抵抗BOT攻击的能力。实验结果表明，图像识别方法无法找到答案文本。还进行了其他实验，以评估拟议的验证码方案的可用性。实验中采用了系统可用性方案。得到的分数是，这意味着该验证码方案具有很高的可用性。这些结果表明，CAPTCHA方案具有足够的可用性和足够的抵抗BOT攻击的能力。
According to the growth of troubles caused by malicious programs called bots, CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) comes to be an important role in the current information society. CAPTCHA identifies bots from legitimate human users by requiring some questions that are easy for humans to solve but difficult for bots. However, the progress of computing technology such as Optical Character Recognition (OCR) function. bots come to be able to solve present CAPTCHAs. In order to outcome such troublesome bots, more sophisticated CAPTCHA that requires the high cognitive ability of human beings is desired. In this paper, we propose a new CAPTCHA scheme that uses random dot patterns. Human beings can recognize a moving figure filled by a random dot pattern from a background that is filled by another random dot pattern; however, they lose the figure in the background when the figure pauses. Since image recognition by computer programs is usually carried out frame by frame, it is hard for bots to recognize such a moving figure filled by a random dot pattern from another random dot pattern background. The proposed CAPTCHA scheme exploits this characteristic of random dot patterns. This CAPTCHA requires users to answer a text filled by a random dot pattern that is moving on a background also filled by another random dot pattern. Several experiments were carried out to confirm that the proposed CAPTCHA scheme has enough resistance against bot attacks using representative image recognition methods. Results of the experiments showed that the image recognition methods cannot find out the answer text. Other experiments were also carried out to evaluate the usability of the proposed CAPTCHA scheme. The system usability scheme was adopted in the experiments. The obtained score was 89 that means this CAPTCHA scheme has high usability. These results showed that the CAPTCHA scheme is usable enough and has enough resistance against bot attacks.
DOI：
10.1109/tdsc.2017.2719031
发表时间：
2019-11-01
影响因子：
7.3
作者：
Gao, Song;Mohamed, Manar;Zhang, Chengcui
通讯作者：
Zhang, Chengcui
DOI：
--
发表时间：
2006
期刊：
--
影响因子：
--
作者：
Iroon Polytechniou-
通讯作者：
Iroon Polytechniou-