Venus AUEB Forum

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The algorithm, called deCAPTCHA, was designed to process sound as closely as possible to the way the human ear absorbs and relays sound information to the brain. The algorithm focuses on lower-frequency sounds while tuning out most of the background noise that distorts an audio CAPTCHA.

The algorithm successfully defeated half of all audio CAPTCHAs from Microsoft and Yahoo. Microsoft then developed a new audio CAPTCHA, which the deCAPTCHA algorithm was still able to conquer in 1.5% of cases. According to Bursztein if an audio CAPTCHA can be defeated in more than 1% of cases the security measures are as good as a “free pass.”
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chriskin wrote:Πού έχει τετοια και δεν τα εχω δει ποτε ;

Spoiler: εμφάνιση/απόκρυψη

[img]http://www.appletvsoftware.net/img/1-10-6/captcha-creator-developer-edition.jpg[/img]

Spoiler: εμφάνιση/απόκρυψη

(γκουχ γκουχ 9 στα 10 captchas που γραφω ειναι σε fileape/filedude)