旁道攻击分为三类：时间分析，功耗分析和故障分析。

Side Channel Attacks could be divided into three branches: time analysis, power analysis and fault analysis.

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差分功耗分析(DPA)作为一种获取密码芯片密钥的旁道攻击方法，对目前的信息安全系统构成了严峻挑战。

Differential power analysis attack (DPA) is a powerful tool for retrieving secrets embedded in cryptographic devices and it has been a considerable threat to the information security system.

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通常，最好在这两处都对其进行检查；这样，即使一个攻击者成功地突破了一道防线，他们还会遇到另一条。

Often, it's best to check in both places; that way, if an attacker manages to slip around one defense, they'll still encounter the other.

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