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When the technology involved in voice recognition has evolved to an acceptable level, it would be a real alternative to touch input CAPTCHA. Sadly to say, we are not quite there yet, if we read the findings of Kapil Chalil Madathils et. al. article Evaluating the usability of CAPTCHAs on a mobile device with voice and touch input. They concludes that...

enter image description here

The results indicate that users may not be satisfied completing CAPTCHAs by voice, at least when using the current Dragon Mobile SDK voice recognition software. Incidentally, Siri - the speech recognition application and personal assistant developed for the iPhone - was not availablefor use at the time of this study. Our results also suggest that Confident Touch is an effective and usable CAPTCHA for mobile devices. An additional benefit to this CAPTCHA is its space saver version that takes up less space on a web page and mobile screen. Overall, our results generally support the use of image-based CAPTCHAs where this is feasible. Some participants in our study appeared frustrated when attempting to recognize the distorted characters in Google's CAPTCHA, and a few even mentioned their frustration with similar text- based CAPTCHAs encountered online. The scores on our usability measures for Google's CAPTCHA, however, werereasonably good.

But things move quickly in this world, and the fact that Siri wasn't tested brings hope for the future of voice recognition CAPTCHA. Until then, image based CAPTCHA is the best option.

When the technology involved in voice recognition has evolved to an acceptable level, it would be a real alternative to touch input CAPTCHA. Sadly to say, we are not quite there yet, if we read the findings of Kapil Chalil Madathils et. al. article Evaluating the usability of CAPTCHAs on a mobile device with voice and touch input. They concludes that...

enter image description here

But things move quickly in this world, and the fact that Siri wasn't tested brings hope for the future of voice recognition CAPTCHA. Until then, image based CAPTCHA is the best option.

When the technology involved in voice recognition has evolved to an acceptable level, it would be a real alternative to touch input CAPTCHA. Sadly to say, we are not quite there yet, if we read the findings of Kapil Chalil Madathils et. al. article Evaluating the usability of CAPTCHAs on a mobile device with voice and touch input. They concludes that...

The results indicate that users may not be satisfied completing CAPTCHAs by voice, at least when using the current Dragon Mobile SDK voice recognition software. Incidentally, Siri - the speech recognition application and personal assistant developed for the iPhone - was not availablefor use at the time of this study. Our results also suggest that Confident Touch is an effective and usable CAPTCHA for mobile devices. An additional benefit to this CAPTCHA is its space saver version that takes up less space on a web page and mobile screen. Overall, our results generally support the use of image-based CAPTCHAs where this is feasible. Some participants in our study appeared frustrated when attempting to recognize the distorted characters in Google's CAPTCHA, and a few even mentioned their frustration with similar text- based CAPTCHAs encountered online. The scores on our usability measures for Google's CAPTCHA, however, werereasonably good.

But things move quickly in this world, and the fact that Siri wasn't tested brings hope for the future of voice recognition CAPTCHA. Until then, image based CAPTCHA is the best option.

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source | link

When the technology involved in voice recognition has evolved to an acceptable level, it would be a real alternative to touch input CAPTCHA. Sadly to say, we are not quite there yet, if we read the findings of Kapil Chalil Madathils et. al. article Evaluating the usability of CAPTCHAs on a mobile device with voice and touch input. They concludes that...

enter image description here

But things move quickly in this world, and the fact that Siri wasn't tested brings hope for the future of voice recognition CAPTCHA. Until then, image based CAPTCHA is the best option.