CAPTCHA – Telling Humans and Computers Apart Automatically
Firstofall,youmakeaskmewhatisCAPTCHA?Inourdailylife,CAPTCHAiseverywhereespeciallywhenwesurfonline.InChinese,CAPTCHAmeans“图片验证码”.HereIwilltalkaboutsomeinterestingaspectsonCAPTCHA.MostideascomefromXiaoj