The point is to protect information, then be able to use that information, which usually means being able to decrypt it.

使用加密主要是保护信息，随后能够使用该信息，后者通常意味着能够对它进行解密。

youdao

That wound me up the most. I was quite depressed about it at that point, because I felt I couldn't protect my property and didn't know who this person was.

这突然使我很紧张了，那次我真的觉得非常沮丧，因为我觉得我根本就不能保护我的财产并且还不知道这个人是谁。

youdao

Wearing footwear first became important from functional point of view as it can protect the feet from cuts, bruises, heat, cold, etc.

穿鞋开始变得重要首先是鉴于其功能性：鞋能保护我们的脚，以防划伤、撞伤、烫伤、冻伤等等。

youdao

Mr. MIKE HUCKABEE (Republican, Former Arkansas Governor): We do have a responsibility to protect life from the point of conception.

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You do an awful but completely rational thing: You begin to build little barriers to avoid getting involved past a certain point to protect yourself.

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Nary any inkling that marines protect our country, their point is fighting and winning wars.

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