Note that this feature might not be able to use a browser's encryption facilities such as Secure Socket Layer (SSL).

注意，这个特性不能使用浏览器的加密设施，比如 Secure Socket Layer (SSL)。

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For Web-based E-mail like Gmail or Yahoo mail, you can use SSL (Secure Sockets Layer) encryption.

对那些像Gmail和雅虎邮的Web邮箱的用户，可以使用SSL加密(加密套接字协议层)。

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TrueCrypt is a popular tool for performing encryption of a volume of data, but it can provide an additional layer of protection by hiding a volume inside an already-encrypted volume.

TrueCrypt是一个常用的工具，可以执行大量数据的加密操作，但是它还提供了一个额外的保护层，在已经加密的卷中隐藏一个卷。

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And security tools really don't help here, Goldsmith says, although strong firewalling and external session-layer encryption are helpful.

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All of these systems provide for encryption capabilities as another layer of security, assuming the option is turned on and actually utilized by different agencies and operatives.

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To cloak the voice calls, the NSA uses two independent layers of encryption, one at the VoIP layer, and the other at the VPN layer.

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