Dictionary of new words

CAPTCHA

captcha: translation

(KAP.chuh)
n.
A computer-generated test that humans can pass but computer programs cannot. Also:Captcha,CAPTCHA.
Example Citation:
With his Ph.D. student Luis von Ahn and others Dr. [Manuel] Blum devised a collection of cognitive puzzles based on the challenging problems of artificial intelligence. The puzzles have the property that computers can generate and grade the tests even though they cannot pass them. The researchers decided to call their puzzlesCaptchas, an acronym for Completely Automated Public Turing Test to Tell Computers and Humans Apart (on the Web at www.captcha.net: http://www.captcha.net/).
One puzzle, called Gimpy, consists of a display of seven distorted, overlapping words chosen at random from a dictionary of simple words. Solving the puzzle requires identifying three of the seven words and typing them into the box provided. The Carnegie Mellon group also created a simplified version of Gimpy — a single distorted word displayed against a complicated background. It is now part of Yahoo's registration process.
AnotherCaptcha, called Sounds, consists of a distorted, computer-generated sound clip containing a word or sequence of numbers. To solve the puzzle, a user must listen to the clip and type the word or numbers into the box provided.
— Sara Robinson, "Human or Computer? Take This Test,"The New York Times, December 10, 2002
Earliest Citation:
It's become a major problem on the Internet, as has the use of 'bots to register for e-mail addresses that are later used to send unwanted advertisements, or spam, to e-mail users.
Blum's research team at Carnegie Mellon University has come up with a solution to the problem, one that the Web portal Yahoo implemented last month.Now, when computer users try to register with Yahoo, they must pass a test to verify that they are human, not a robot.
The test is administered by a computer program.
"Here you have a computer program that creates a test, administers it and grades it, but can't pass its own test," Blum said.
It's what Blum calls a "captcha," a "gotcha"-inspired acronym that means Completely Automatic Public Turing test to tell Computers and Humans Apart.
Thecaptchais based on the fact that people can easily analyze images that flummox computers. For the Yahoo site, new registrants must read a common word that has been twisted or distorted and then type it into a box. It's easy for humans; impossible for computers.
— Byron Spice, "Robot solves Internet robot problem,"Pittsburgh Post-Gazette, October 21, 2001
Notes:
As the example citation says, the wordcaptchabegan life as an acronym for the phrase Completely Automated Public Turing test to tell Computers and Humans Apart. What's aTuring test? In 1950, the mathematician Alan Turing suggested that a computer could earn the label "intelligent" if it could fool a person into thinking he or she was communicating with another person instead of a machine. Acaptchais mostly interested in the opposite scenario: proving that a Web form (or whatever) is being submitted by a human instead of a computer program. This twist on Turing's original idea is why some people callcaptchasreverse Turing tests.
Related Words:
gasp test
giggle test
scalper-bot
smell test
Categories:
Computers (General)
Internet
Privacy and Security
Programming and Software
Acronyms and Abbreviations

  1. captcha—Captcha bersetzung Captcha [kpt] der od.u das s s [Kurzwort aus engl.u cstrongompletely astrongutomated pstrongublic Tstronguring test to tell cstrongomputers and hstrong...Universal-Lexicon
  2. captcha—Captcha bersetzung Captcha [kpt] der od.u das s s [Kurzwort aus engl.u cstrongompletely astrongutomated pstrongublic Tstronguring test to tell cstrongomputers and hstrong...Universal-Lexicon
  3. captcha—Полностью автоматизированный открытый тест Тьюринга по распознанию людей и машин...Англо-русский большой универсальный переводческий словарь
  4. captcha—сокр. от Completely Automated Public Turing Test to Tell Computers and Humans Apart Полностью автоматизированный открытый тест Тьюринга по распознанию людей и машин...Англо-русский словарь общей лексики