Google's reCAPTCHA is the leading CAPTCHA service (that's "Completely Automated Public Turing test to tell Computers and Humans Apart") on the Web. You've probably seen CAPTCHAs a million times on sign-up pages across the Web; to separate humans from spam bots, a challenge will pop up asking you to decipher a picture of words or numbers, pick out objects in a grid of pictures, or just click a chec
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j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く