Thread: VOTE NOW! Poll for Napolitano resignation

CAPTCHA
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Jump to: navigation, search

Early CAPTCHAs such as these, generated by the EZ-Gimpy program, were used on Yahoo!. However, technology was developed to read this type of CAPTCHA[1]
A modern CAPTCHA, rather than attempting to create a distorted background and high levels of warping on the text, might focus on making segmentation difficult by adding an angled line
Another way to make segmentation difficult is to crowd symbols together. However, this might be difficult for some people to read
A newer type of CAPTCHA which uses generated images of 3D objects randomly rotated [2].A CAPTCHA or Captcha (IPA: /ˈkæptʃə/) is a type of challenge-response test used in computing to ensure that the response is not generated by a computer. The process usually involves one computer (a server) asking a user to complete a simple test which the computer is able to generate and grade. Because other computers are unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human. Thus, it is sometimes described as a reverse Turing test, because it is administered by a machine and targeted to a human, in contrast to the standard Turing test that is typically administered by a human and targeted to a machine. A common type of CAPTCHA requires that the user type letters or digits from a distorted image that appears on the screen.

The term "CAPTCHA" (based upon the word capture) was coined in 2000 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper (all of Carnegie Mellon University), and John Langford (then of IBM). It is a contrived acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart." Carnegie Mellon University attempted to trademark the term,[3] but the trademark application was abandoned on 21 April 2008.[4] Currently, CAPTCHA creators recommend use of reCAPTCHA as the official implementation.[5]

A CAPTCHA system is a means of automatically generating new challenges which:

Current software is unable to solve accurately.
Most humans can solve
The visually disabled who rely on screen reading technology cannot solve a visual CAPTCHA, thus limiting or preventing their access to some sites (see below for accessibility considerations)
Does not rely on the type of CAPTCHA being new to the attacker.
Although a checkbox "check here if you are not a bot" might serve to distinguish between humans and computers, it is not a CAPTCHA because it relies on the fact that an attacker has not spent effort to break that specific form.

Withholding of the algorithm can increase the integrity of a limited set of systems, as in the practice of security through obscurity. The most important factor in deciding whether an algorithm should be made open or restricted is the size of the system. Although an algorithm which survives scrutiny by security experts may be assumed to be more conceptually secure than an unevaluated algorithm, an unevaluated algorithm specific to a very limited set of systems is always of less interest to those engaging in automated abuse. Breaking a CAPTCHA generally requires some effort specific to that particular CAPTCHA implementation, and an abuser may decide that the benefit granted by automated bypass is negated by the effort required to engage in abuse of that system in the first place.

etc....there's a lot more on this wikipedia site

http://en.wikipedia.org/wiki/Captcha

Should Janet Napolitano, head of Homeland Security, be forced to resign for having targeted loyal, patriotic Americans as possible terrorists?

No: 24904 / 55135 45%

Yes: 29784 / 55135 54%

No: 24904 / 55217 45%

Yes: 29865 / 55217 54%

Originally Posted by ShockedinCalifornia

CAPTCHA
From Wikipedia, the free encyclopedia
(Redirected from Captcha)
Jump to: navigation, search

Early CAPTCHAs such as these, generated by the EZ-Gimpy program, were used on Yahoo!. However, technology was developed to read this type of CAPTCHA[1]
A modern CAPTCHA, rather than attempting to create a distorted background and high levels of warping on the text, might focus on making segmentation difficult by adding an angled line
Another way to make segmentation difficult is to crowd symbols together. However, this might be difficult for some people to read
A newer type of CAPTCHA which uses generated images of 3D objects randomly rotated [2].A CAPTCHA or Captcha (IPA: /ˈkæptʃə/) is a type of challenge-response test used in computing to ensure that the response is not generated by a computer. The process usually involves one computer (a server) asking a user to complete a simple test which the computer is able to generate and grade. Because other computers are unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human. Thus, it is sometimes described as a reverse Turing test, because it is administered by a machine and targeted to a human, in contrast to the standard Turing test that is typically administered by a human and targeted to a machine. A common type of CAPTCHA requires that the user type letters or digits from a distorted image that appears on the screen.

The term "CAPTCHA" (based upon the word capture) was coined in 2000 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper (all of Carnegie Mellon University), and John Langford (then of IBM). It is a contrived acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart." Carnegie Mellon University attempted to trademark the term,[3] but the trademark application was abandoned on 21 April 2008.[4] Currently, CAPTCHA creators recommend use of reCAPTCHA as the official implementation.[5]

A CAPTCHA system is a means of automatically generating new challenges which:

Current software is unable to solve accurately.
Most humans can solve
The visually disabled who rely on screen reading technology cannot solve a visual CAPTCHA, thus limiting or preventing their access to some sites (see below for accessibility considerations)
Does not rely on the type of CAPTCHA being new to the attacker.
Although a checkbox "check here if you are not a bot" might serve to distinguish between humans and computers, it is not a CAPTCHA because it relies on the fact that an attacker has not spent effort to break that specific form.

Withholding of the algorithm can increase the integrity of a limited set of systems, as in the practice of security through obscurity. The most important factor in deciding whether an algorithm should be made open or restricted is the size of the system. Although an algorithm which survives scrutiny by security experts may be assumed to be more conceptually secure than an unevaluated algorithm, an unevaluated algorithm specific to a very limited set of systems is always of less interest to those engaging in automated abuse. Breaking a CAPTCHA generally requires some effort specific to that particular CAPTCHA implementation, and an abuser may decide that the benefit granted by automated bypass is negated by the effort required to engage in abuse of that system in the first place.

etc....there's a lot more on this wikipedia site

http://en.wikipedia.org/wiki/Captcha

Wow....thank you Shocked!!

Remarkably enough, it was the first time I had ever seen this at the bottom of a poll question and was just wondering what it was, if it should be there, etc.

I guess I'm still antsy and just being overly cautious after having had to go out and replace my system after being hopelessly infected by something sinister awhile back, that's all

So, that CV should be there right? I'd really like to vote in the poll.

This poll is bogus I kept going back and voted yes 6 times and it let me LOL Savage got had on his poll

Have you noticed the split in our Country? If you look at most any 'open' pole such as this (bogus or not) we as a people are now usually split.

It just shows the great divide in our Country.

Should Janet Napolitano, head of Homeland Security, be forced to resign for having targeted loyal, patriotic Americans as possible terrorists?

No: 24922 / 56906 43%


Yes: 31515 / 56906 55%

No: 24923 / 57062 43%

Yes: 31666 / 57062 55%

Should Janet Napolitano, head of Homeland Security, be forced to resign for having targeted loyal, patriotic Americans as possible terrorists?


No: 24923 / 57069 43%

Yes: 31672 / 57069 55%


PS she wont resign unless another mass murder occurs on our soil!

No 24923/57078 43%

Yes 31680/57078 55%