Update captcha.md

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shimingxy
2020-05-15 13:22:03 +08:00
parent c4c5a11c5c
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验证码CAPTCHA是“Completely Automated Public Turing test to tell Computers and Humans Apart”全自动区分计算机和人类的图灵测试的缩写是一种区分用户是计算机还是人的公共全自动程序。可以防止用户用特定程序暴力破解方式进行不断的登陆尝试。
文本验证码
<b>文本验证码</b>
<img src="{{ "/images/authn/captcha_text.png" | prepend: site.baseurl }}?{{ site.time | date: "%Y%m%d%H%M" }}" alt=""/>
算术验证码
<b>算术验证码</b>
<img src="{{ "/images/authn/captcha_arithmetic.png" | prepend: site.baseurl }}?{{ site.time | date: "%Y%m%d%H%M" }}" alt=""/>