Claudio LimaTeacher: Roza M. Zilles Borba         Novo Hamburgo            May, 2011
Completely Automated Public Turing test to tell Computers and Humans ApartA test used in computing to determine if the use...
• Filling up a form on the web• Entering in a chat• Sending many mails at the same time• Consulting your bank account on b...
Client  server model         ClientClient                                 serverClient         Client
Receita Federal   SERVER  can process 100 requests in 1 min
If a hacker build a software that can send 400 requests in 1 minute                                                  RECEI...
RECEITA  FEDERAL SERVER is can processOUT-OF-DATA
It means that:   * ther server will not response to requests   * fix it takes time and money   * the website’s reputation ...
You      server
Foram entrevistados 69,7% dos alunos formados entre 2007 e 2010.Appears this screen CAPTCHA
SOURCE•   The Official captcha website. Available at http://www.captcha.net/ Access in May 27    2011.•   What captcha mea...
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A show-and-tell presentatios of my English Conversation Classes

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  1. 1. Claudio LimaTeacher: Roza M. Zilles Borba Novo Hamburgo May, 2011
  2. 2. Completely Automated Public Turing test to tell Computers and Humans ApartA test used in computing to determine if the user is human or a computer program.Is asked a question that only a human can answer
  3. 3. • Filling up a form on the web• Entering in a chat• Sending many mails at the same time• Consulting your bank account on bank’s online systems• Checking info at the government websites
  4. 4. Client  server model ClientClient serverClient Client
  5. 5. Receita Federal SERVER can process 100 requests in 1 min
  6. 6. If a hacker build a software that can send 400 requests in 1 minute RECEITA FEDERAL can process 100 requests in 1 min
  7. 7. RECEITA FEDERAL SERVER is can processOUT-OF-DATA
  8. 8. It means that: * ther server will not response to requests * fix it takes time and money * the website’s reputation is shaken
  9. 9. You server
  10. 10. Foram entrevistados 69,7% dos alunos formados entre 2007 e 2010.Appears this screen CAPTCHA
  11. 11. SOURCE• The Official captcha website. Available at http://www.captcha.net/ Access in May 27 2011.• What captcha means . Available at http://www.kirps.com/web/main/_blog/all/do-you- know-what-the-term-captcha-means.shtml Access in May 25 2011 Contact claudiolima@feevale.br twitter.com/claudiodelima claudiodelima.wordpress.com Presentation available at slideshare.com/claudiodelima

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