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在Windows系统上的很多应用都集成了安全功能，安全功能多通过加密技术实现。如outlook中的安全电子邮件功能（对邮件签名、加密），IE，IIS中的SSL（在浏览器和WEB服务器之间建立安全连接）等。-Many applications in Windows system are integrated security function, safety function by encryption. Such as the outlook of secure e-mail function (for mail signature, encryption), IE, IIS in the SSL (secure connection is established between the browser and the WEB server).