是为保证在开放式环境中网络传输的安全而提供的加密服务。 通常大量使用的两种密钥加密技术是：私用密钥（对称加密）和公共密钥（非对称加密）。
它的设计目的是，通过使用密钥加密技术，为客户端-服务器应用程序提供强大的身份验证和加密通信。
It is designed to provide strong authentication and encrypted communication for client-server applications by using secret-key cryptography.
本文主要介绍了计算机信息的常规加密技术和公开密钥加密技术，并对两者的优缺点和应用环境作了比较。
This paper introduces the routine encryption of computer information and the publicity key encryption mainly, and compares the both and their environment.
因为这是使用非对象加密技术，而每一端有自己的证书和私有密钥，比起清单5对称加密技术示例，它处理起来更为简单。
Because this is using asymmetric encryption, where each side has its own certificate and private key, it should be somewhat simpler to handle than the Listing 5 symmetric-encryption example.
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