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Another source to secure your website, social network, blog ect ...


A CAPTCHA is a program that protects websites against bots by generating and grading tests that humans can pass but current computer programs cannot. For example, humans can read distorted text as the one shown below, but current computer programs can't:

http://www.captcha.net/

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Luis von Ahn, Manuel Blum, Nicholas Hopper, and John Langford. CAPTCHA: Using Hard AI Problems for Security. In Eurocrypt.
http://www.captcha.net/captcha_crypt.pdf

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Another source of security, very sharp.

Artificial Intelligence
Beloved of Hollywood, the serious scientific community and even industry for the many benefits it brings, artificial intelligence programming is everywhere!

Smart homes allow disabled or elderly homeowners to control everything in a home, from entertainment to security, at the touch of a button - or even by voice command.
Natural language processing helps us converse with computers, as well as performing more mundane tasks, like translating languages and reading ebooks aloud.
Artificial intelligence algorithms help banks make judgments about creditworthiness and alert us when there's danger of identity theft.


http://www.suite101.com/artificialintelligence