CAPTCHA

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-	<ref>{{cite journal | author = Luis von Ahn, Ben Maurer, Colin McMillen, David Abraham and Manuel Blum | date= 2008 | url = http://www.cs.cmu.edu/~biglou/reCAPTCHA_Science.pdf| format = PDF | title = reCAPTCHA: Human-Based Character Recognition via Web Security Measures| journal=Science | volume=321 | pages=1465–1468}}</ref>	+	[[Image:Sin_captcha.jpg]]
	== References ==		== References ==
-	{{Reflist}}	+
		+	# Luis von Ahn, Ben Maurer, Colin McMillen, David Abraham and Manuel Blum, [http://www.cs.cmu.edu/~biglou/reCAPTCHA_Science.pdf reCAPTCHA: Human-Based Character Recognition via Web Security Measures]. In ''Science''.
		+	# Luis von Ahn, Manuel Blum, Nicholas Hopper, and John Langford. [http://www.captcha.net/captcha_crypt.pdf CAPTCHA: Using Hard AI Problems for Security]. In ''Eurocrypt''.
		+	# Luis von Ahn, Manuel Blum and John Langford. [http://www.captcha.net/captcha_cacm.pdf Telling Humans and Computers Apart Automatically]. In ''Communications of the ACM''.

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Revision as of 13:50, 6 April 2009

References

1. Luis von Ahn, Ben Maurer, Colin McMillen, David Abraham and Manuel Blum, reCAPTCHA: Human-Based Character Recognition via Web Security Measures. In Science.
2. Luis von Ahn, Manuel Blum, Nicholas Hopper, and John Langford. CAPTCHA: Using Hard AI Problems for Security. In Eurocrypt.
3. Luis von Ahn, Manuel Blum and John Langford. Telling Humans and Computers Apart Automatically. In Communications of the ACM.