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Before you attempt another image challenge, clear the cache on your web browser. If you're still prompted to retake the image challenge multiple times a day, you might have a more serious issue. Check out the Security Center for info about recommended antivirus software and reset your password to make sure it's secure.
This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.
reCAPTCHA Inc. [1] is a CAPTCHA system owned by Google.It enables web hosts to distinguish between human and automated access to websites. The original version asked users to decipher hard-to-read text or match images.
The simplest example of a challenge-response protocol is password authentication, where the challenge is asking for the password and the valid response is the correct password. An adversary who can eavesdrop on a password authentication can authenticate themselves by reusing the intercepted password.
Spam messages can't be sent if the user opts out of them. When a user opts out of a message, their e-mail gets stored in a public registry. Companies sending spam messages to users registered in the registry have to pay a fine. Under the ECA, spam messages can't be sent if the address of the spam message is invalid or the user identity is unknown.
In cryptography, the Salted Challenge Response Authentication Mechanism (SCRAM) is a family of modern, ...
The cloud of steam, from the roof of a building on 34th Street between 2nd and 3rd Avenues. The top of the 1,047-foot-high (319 m) Chrysler Building can be seen on the right; the steam cloud rises far above it. The cloud of steam, as seen from the 59th floor of the Empire State Building. The Chrysler Building can be seen enshrouded in steam.
It appears that some recommend that Wikimedia itself use the service in the future, too (of course that's off-topic, but an example of the service's popularity and the potential implications). 66.11.179.30 08:52, 24 January 2011 (UTC) Also, it should be added that reCaptcha can be a bad thing as a user may be used to solve another's captcha.