第二，浏览器可以提供允许非专业使用者避免连接到似乎已批准的非法站点的类似广告阻拦者们或者垃圾邮件黑名单的工具。

Second, browsers could offer tools that resemble ad blockers or spam blacklists that would allow non-expert users to avoid connections to illegitimate sites that seem to have been validated.

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在垃圾邮件过滤中使用的白名单和黑名单的基本原理是非常简单的。

The fundamentals of the white and blacklists used in spam filtering are very simple.

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使用白名单和黑名单，需要为垃圾邮件解决方案增加一个线程(请参见图3)。

Using whitelists and blacklists adds another thread to the spam solution (see Figure 3).

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