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What the heck is a CAPTCHA?
#286 | 3:40 |
Tuesday June 30, 2009
Tutorials
Tuesday June 30, 2009
We've all run into
CAPTCHAs
: those sometimes annoying, sometimes hard to decipher strings of characters and numbers that appear online. They have to be punched in exactly as they appear when signing up for a free email account, posting a comment in a public forum and so on. But what are they and what purpose do they serve? Stacy Reed explains.Download this episode now
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Windows Media Show Notes
- CAPTCHA is an acronym that stands for
- They prevent automated software from exploiting weaknesses and general abuse.
- Some sites utilize audible
-
- reCAPTCHA is a service that works alongside Optical Character Recognition (OCR) software in order to archive books, using human intelligence to decipher words that the computer cannot, while simultaneously serving as a CAPTCHA to tell humans and computers apart.
Completely Automated Public Turing Test to Tell Computers and Humans Apart
.- They prevent automated software from exploiting weaknesses and general abuse.
- Some sites utilize audible
CAPTCHA
applications designed specifically for visually impaired users.-
CAPTCHA
applications can be installed into websites or blogs for free by pasting code into HTML or by inserting plugins.- reCAPTCHA is a service that works alongside Optical Character Recognition (OCR) software in order to archive books, using human intelligence to decipher words that the computer cannot, while simultaneously serving as a CAPTCHA to tell humans and computers apart.
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