这些分数都是采用了秘密算法得出，以确保证机构对你的了解超过你对他们的了解。

These scores are produced using secret algorithms, ensuring that the bureaus know much more about you than you know about them.

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现在，搜索巨头透露说它已经微调改进了用来给网页评级的秘密算法。改进这种算法就是要让垃圾邮件的发送者们日子不好过。

Now the search giant has revealed that it has tweaked the secret formula that it USES to rank web pages in ways that it hopes will make life harder for the purveyors of such spam.

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非对称算法使用不同的密钥对消息进行加密或解密；其中一个秘钥必须是秘密的，而另一个密钥通常是公开的。

An asymmetric algorithm USES a different key for encrypting or decrypting the message; one of the keys must be kept secret, and the other key is usually made public.

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