Hi All:
I've been trying out an
audio CAPTCHA from Google. It is the most difficult such CAPTCHA that I've
encountered. In fact it is almost impossible to use. It has too many
words and the background noise seems to be too loud relative to the actual words
being spoken.
My
questions:
First, can anyone recommend
alternative audio CAPTCHA schemes that are usable yet meet the intended security
purposes?
Second, can anyone
recommend alternative schemes that provide security and privacy with
minimal human intervention as CAPTCHA does?
Thanks for any
information!
Stan
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