A User-friendly CAPTCHA Scheme Based on Usability Features
نویسندگان
چکیده
منابع مشابه
SemCAPTCHA - user-friendly alternative for OCR-based CAPTCHA systems
In this paper we present a new CAPTCHA system (Completely Automated Turing Test To Tell Computers and Humans Apart). This proposal, SemCAPTCHA, is motivated by an increasing number of broken OCR-based CAPTCHA systems and it is based not only on text recognition but also on text understanding. We describe SemCAPTCHA from both user’s perspective and system’s perspective and compare it to some cur...
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CAPTCHAs are a standard security mechanism used on many websites to protect online services against abuse by automated programs, or bots. The purpose of a CAPTCHA is to distinguish whether an online transaction is being carried out by a human or a bot. Unfortunately, to date many existing CAPTCHA schemes have been found to be vulnerable to automated attacks. It is widely accepted that state-of-...
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متن کاملSemCAPTCHA – the user - friendly alternative for OCR - based CAPTCHA systems † Pawe ł
In this paper we present a new CAPTCHA system (Completely Automated Turing Test To Tell Computers and Humans Apart). The proposal of SemCAPTCHA is motivated by an increasing number of broken OCR-based CAPTCHA systems and it is based not only on text recognition but also on text understanding. We describe both, the user’s and the system’s perspective of SemCAPTCHA and compare it with some curren...
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ژورنال
عنوان ژورنال: Information Technology Journal
سال: 2012
ISSN: 1812-5638
DOI: 10.3923/itj.2013.61.70