It helps to recognise what attack vector take into account and then you can choose the right method of protecting the key.

它有助于识别什么攻击矢量被考虑，然后你可以选择正确的方法来保护密钥。

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What happens is your immune response goes haywire and then your body starts to attack itself, so theres a failure to shutdown.

VOA: special.2010.03.16

He moved most of his men into position to attack what he now knew was the weak, right side of the Union line.

VOA: special.2009.09.17

He stopped moving forward and prepared to defend against what seemed to be a strong Confederate attack.

VOA: special.2009.08.27

Voters know this, however, and are highly sceptical of what attack ads tell them.

ECONOMIST: The mid-term mud starts to fly

Antigen-presenting cells collect fragments of proteins from foreign bodies (normally pathogens, such as viruses and bacteria, but also transplanted organs) and show these to T cells, in order to tell them what to attack.

ECONOMIST: Breaching the body's defences

And what I worry about is that we're focusing way too much on what happened after the attack and not nearly enough on what happened in the weeks leading up to the attack.

NPR: Week In Politics: Immigration & Benghazi