​新的Replica集身份认证功能允许Replica集的成员之间进行自动身份认证，其中使用了密钥文件和 –keyfile 选项。

The new replica-set authentication feature allows automatic authentication among replica-set members using a key file and the –keyfile option.

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身份认证是密钥交换协议的重要组成部分。

Identity authentication is an important component of the key exchange protocol.

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IC卡能集成复杂的密钥认证与身份鉴别逻辑，必将取代以前的磁卡、ID卡(即感应式“磁卡”)。

IC CARDS can be integrated complex key authentication and identification logic, will replace the previous CARDS, id CARDS (that is, inductive "magnetic").

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