Reliable Image-Text Fusion CAPTCHA to Improve User-Friendliness and Efficiency
نویسندگان
چکیده
منابع مشابه
OTRCaptcha: A Novel Object and Text Recognition Based Image CAPTCHA
CAPTCHA is an important technology to prevent auto-script attack. Currently most of the CAPTCHA systems are text based, which firstly distort, rotate different characters and then use some obfuscation, aiming to make the text difficult to be recognized by autoscript while still can be learnt easily by real users. However, such kind of CAPTCHA schema either too simple, which can be attacked easi...
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The massive and automated access to Web resources through robots has made it essential for Web service providers to make some conclusion about whether the "user" is a human or a robot. A Human Interaction Proof (HIP) like Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) offers a way to make such a distinction. CAPTCHA is a reverse Turing test used by Web serv...
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In this paper, we propose an extension of TCP Westwood allowing the management of the Efficiency/Friendliness-toNewReno tradeoffs. We show that the extended TCP Westwood is able to achieve higher total link utilization, yet at the same time maintain friendliness. TCP Westwood (for short, TCPW) implements a novel window congestion control algorithm based on eligible rate estimation. The performa...
متن کاملImage Flip CAPTCHA
The massive and automated access to Web resources through robots has made it essential for Web service providers to make some conclusion about whether the ”user” is a human or a robot. A Human Interaction Proof (HIP) like Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) offers a way to make such a distinction. CAPTCHA is a reverse Turing test used by Web serv...
متن کاملText Inpainting and Its Application in Video Captcha Text Removal
Video CAPTCHA improves the usability while reducing the attack success rate compared to a conventional text-based CAPTCHA. However, it remains vulnerable to OCR attacks. Thus, we proposed to use inpainting algorithms to remove the contained text in the video frames, so that the OCR success rate can be reduced without introducing unwanted artifacts that displease the endusers. We implemented Ber...
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ژورنال
عنوان ژورنال: The KIPS Transactions:PartC
سال: 2010
ISSN: 1598-2858
DOI: 10.3745/kipstc.2010.17c.1.027