The most popular such method is CAPTCHA.

最常见的一种方法是 CAPTCHA。

Figure 3 is an example of a CAPTCHA image.

图 3 是 CAPTCHA 图像的一个例子。

Are some CAPTCHA devices better than others?

是否有些CAPTCHA设备比其他设备更好？

I want users to have to fill in a captcha to comment.

我希望用户必须要回答captcha才能写注释。

The image is then presented as a CAPTCHA in the usual way.

然后这个图片以常规方式显示为验证码。

The most simple negative CAPTCHA is one hidden honeypot field.

大多数简单的negative CAPTCHA就是一个隐藏的‘蜜罐’域。

I see at wordspy.com the first citation for captcha is October 2002.

我在wordspy.com看到的第一条captcha的引文是在2002年十月份。

That string of letters has a name; it's called a CAPTCHA. And it's a test.

这串字母叫做CAPTCHA，它是一个测试。

Of course, but picking the right CAPTCHA device is an implementation detail.

当然，选择正确的 CAPTCHA 设备是一个实现细节。

Fend them off with more generic error messages and possibly require to enter a CAPTCHA.

用更通用的错误信息来阻断这种攻击，可能需要输入一个验证码。

A CAPTCHA is a challenge-response test to determine that the response is not generated by a computer.

—一个验证码是质问-响应的测试以便于确定这个响应是不是被一个计算机产生的。

Moreover, you can require to enter a CAPTCHA after a number of failed logins from a certain IP address.

此外，在某一个ip地址多次登陆失败之后你可以要求输入一个验证码。

Even better, the system has proved to be far better at resisting attacks than other types of CAPTCHA.

更妙的是，这一系统已经证明其在抵御攻击方面比其他类型的验证码具有更加卓越的性能。

Readers might have noticed that both of Google's CAPTCHA systems suddenly become more difficult to parse.

读者可能已经注意到Google的CAPTCHA系统突然变得更难识别。

He gives an example: a CAPTCHA in which each letter was always formed out of the same number of pixels.

他举了一个例子：在一个验证码中，每个字母都是由一定数量的像素组成的。

If you've signed up for any sort of online service there is a high likelihood you're very familiar with CAPTCHA.

如果您曾经需要在线注册任何形式的网上服务，你很可能已经熟悉了CAPTCHA。

The point of the CAPTCHA is that reading those swirly letters is something that computers aren't very good at.

该测试的重点在于，对于计算机来说，它们不善于辨识这些纠结的字母。

A CAPTCHA is a program that can generate and grade tests that humans can pass but current computer programs cannot.

一个CAPTCHA程序能够生成一些人类能通过，但是目前的计算机却无法通过的测试。

Perhaps Captcha or another security measure to prevent such spamming will be instituted to prevent any such issues.

也许通过验证码或其他措施可以有效防止类似问题。

Try advancing the captcha arms race through measured click-hold times for your Web authentication applications.

尝试通过为We b验证应用程序测量单击按住时间，进一步推动captcha技术。

Spammers use optical character recognition to defeat CAPTCHA, so there is usually significant distortion to the images.

垃圾信息散布者常常会使用视觉字符识别来破解CAPTCHA，所以通常我们需要严重歪曲这些图像。

Each unknown word is presented as a CAPTCHA several times, to different users, to ensure that it has been read correctly.

每一个未知词作为验证码呈现给不同用户数次，确保它被正确辨认。

So all I had to do when the signup screen loaded was enter a number before the @ sign in email, enter the captcha, and click signup.

于是，我要做的就是，当注册页面出现时，在邮件地址“@yourdomain.com” 前面加上一个数字以及输入验证码，然后点击“现在注册”按钮。

Try advancing the captcha arms race through measured keystroke press and release times for your web authentication applications.

通过在Web身份验证应用程序中测量击键按下和释放时间，进一步推动captcha竞赛。

The biggest flaw with all CAPTCHA systems is that they are, by definition, susceptible to attack by humans who are paid to solve them.

所有的CAPTCHA验证系统都有一个最大的瑕疵：顾名思义，它们在人类本身的进攻面前不堪一击，有人付款给这些人破解它们。

Even if those Numbers exaggerate the system's efficacy tenfold, though, it would still represent a significant blow to the CAPTCHA model.

即便这些结果是实际系统效用的10倍，也仍然是对CAPTCHA模式的一记重击。