captcha.ppt

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avinash2008

The document discusses CAPTCHAs, which are programs that can distinguish humans from computers by generating tests that are easy for humans but difficult for computers. It provides background on CAPTCHAs, describes common types including text, graphic, and audio CAPTCHAs, and discusses techniques for breaking existing CAPTCHAs. It then proposes a new approach to CAPTCHAs that uses distorted images of concrete objects from Google Images and requires users to identify the object from a list of words to address limitations in other CAPTCHAs.

Technologie

Presented by: AVINASH MAURYA IT VI SEM 0829213008

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I present a new security primitive based on hard AI problems, namely, a novel family of graph-ical password systems built on top of Captcha technology, which we call Captcha as graphical passwords (CaRP). CaRP is both a Captcha and a graphical password scheme. CaRP addresses a number of security problems altogether, such as online guessing attacks, relay attacks, and, if combined with dual-view technologies, shoulder-surfing attacks. Notably, a CaRP password can be found only probabilistically by automatic online guessing attacks even if the password is in the search set. CaRP also offers a novel approach to address the well-known image hotspot problem in popular graphical password systems, such as PassPoints, that often leads to weak password choices. CaRP is not a panacea, but it offers reasonable security and usability and appears to fit well with some practical applications for improving online security.

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Captcha are used widely over the World Wide Web to prevent automated programs in order to scrape a data from websites. Captcha is a challenge response test used to ensure that the response is generated by a person not by a computer. Users are asked to read and type a string of distorted characters in order to ensure that the user is human or not. Automation is real problem for web application. Automated attacks can exploit many services: 1. Blogs 2. Forums 3. Phishing 4. Theft of data Registration Websites use CAPTCHA (completely automated public turing test to tell computers and human apart) systems to prevent the bot programs from wasting their resources. Today is the Era of where technologies are changes very rapidly. So spammers are hackers are also trying something new to cracking captcha. That’s why it is necessary to developing an advanced technology to generating a captcha. Just like simply generating a Captcha Images from text, or rotating an object within images.

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Human Interactive Proofs (HIPs) are automatic reverse Turing tests designed to distinguish between various groups of users. Completely Automatic Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a HIP system that distinguish between humans and malicious computer programs. Many CAPTCHAs have been proposed in the literature that text-graphical based, audio-based, puzzle-based and mathematical questions-based. The design and implementation of CAPTCHAs fall in the realm of Artificial Intelligence. We aim to utilize CAPTCHAs as a tool to improve the security of Internet based applications. In this paper we present a framework for a text-based CAPTCHA based on Devanagari script which can exploit the difference in the reading proficiency between humans and computer programs. Our selection of Devanagari script-based CAPTCHA is based on the fact that it is used by a large number of Indian languages including Hindi which is the third most spoken language. There is potential for an exponential rise in the applications that are likely to be developed in that script thereby making it easy to secure Indian language based applications.

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Angeliki Cooney has spent over twenty years at the forefront of the life sciences industry, working out of Wynantskill, NY. She is highly regarded for her dedication to advancing the development and accessibility of innovative treatments for chronic diseases, rare disorders, and cancer. Her professional journey has centered on strategic consulting for biopharmaceutical companies, facilitating digital transformation, enhancing omnichannel engagement, and refining strategic commercial practices. Angeliki's innovative contributions include pioneering several software-as-a-service (SaaS) products for the life sciences sector, earning her three patents. As the Senior Vice President of Life Sciences at Avenga, Angeliki orchestrated the firm's strategic entry into the U.S. market. Avenga, a renowned digital engineering and consulting firm, partners with significant entities in the pharmaceutical and biotechnology fields. Her leadership was instrumental in expanding Avenga's client base and establishing its presence in the competitive U.S. market.

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captcha.ppt

1. Presented by: AVINASH MAURYA IT VI SEM 0829213008

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