加密内置于.NET配置系统中。您可以加密您的应用/ web.config文件的块，包括您存储私钥的位置。

Encryption is built into the .NET configuration system. You can encrypt chunks of your app/web.config file, including where you store your private key.

http://www.dotnetprofessional.com/blog/post/2008/03/03 /Encrypt-sections-of-WebConfig-or-AppConfig.aspx