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CAPTCHA

Known as: Image Verification, Gausebeck-Levchin test, Completely Automated Public Turing Test to Tell Computers and Humans Apart 
A CAPTCHA (a backronym for "Completely Automated Public Turing test to tell Computers and Humans Apart") is a type of challenge-response test used in… 
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Related topics

Related topics

49 relations
AI-completeAdobe ColdFusionAndrei BroderAnti-spam techniques

Broader (2)

Computer securityComputer vision

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
Highly Cited
2015
Highly Cited
2015
CAPTCHA Recognition with Active Deep Learning
CAPTCHAs are automated tests to tell computers and humans apart. They are designed to be easily solvable by humans, but… 
Highly Cited
2012
Highly Cited
2012
The OU-ISIR Gait Database Comprising the Large Population Dataset and Performance Evaluation of Gait Recognition
This paper describes the world's largest gait database-the “OU-ISIR Gait Database, Large Population Dataset”-and its application… 
Highly Cited
2011
Highly Cited
2011
Text-based CAPTCHA strengths and weaknesses
We carry out a systematic study of existing visual CAPTCHAs based on distorted characters that are augmented with anti… 
Highly Cited
2010
Highly Cited
2010
Re: CAPTCHAs-Understanding CAPTCHA-Solving Services in an Economic Context
Reverse Turing tests, or CAPTCHA s, have become an ubiquitous defense used to protect open Web resources from being exploited at… 
Highly Cited
2010
Highly Cited
2010
How Good Are Humans at Solving CAPTCHAs? A Large Scale Evaluation
Captchas are designed to be easy for humans but hard for machines. However, most recent research has focused only on making them… 
Highly Cited
2008
Highly Cited
2008
Usability of CAPTCHAs or usability issues in CAPTCHA design
CAPTCHA is now almost a standard security technology, and has found widespread application in commercial websites. Usability and… 
Highly Cited
2008
Highly Cited
2008
Machine learning attacks against the Asirra CAPTCHA
The Asirra CAPTCHA [EDHS2007], proposed at ACM CCS 2007, relies on the problem of distinguishing images of cats and dogs (a task… 
Highly Cited
2007
Highly Cited
2007
Asirra: a CAPTCHA that exploits interest-aligned manual image categorization
We present Asirra (Figure 1), a CAPTCHA that asks users to identify cats out of a set of 12 photographs of both cats and dogs… 
Highly Cited
2007
Highly Cited
2007
Breaking Visual CAPTCHAs with Naive Pattern Recognition Algorithms
Visual CAPTCHAs have been widely used across the Internet to defend against undesirable or malicious bot programs. In this paper… 
Highly Cited
1998
Highly Cited
1998
A public key watermark for image verification and authentication
  • P. Wong
  • Proceedings International Conference on Image…
  • 1998
  • Corpus ID: 15447332
We propose a public key watermarking algorithm for image integrity verification. This watermark is capable of detecting any… 
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