修改为加密后的Web.config/App.config文件内容：
<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns="http://www.easck.com/.NetConfiguration/v2.0">
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
</startup>
<configProtectedData>
<providers>
<clear />
<add name="KeyProvider" type="System.Configuration.RsaProtectedConfigurationProvider, System.Configuration, Version=2.0.0.0,Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" keyContainerName="Key" useMachineContainer="true"/>
</providers>
</configProtectedData>
<connectionStrings>
<add name="connStr" connectionString="Data Source=.;Initial Catalog=testDB;User ID=sa;Password=123456;" providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
加密后的Web.config/App.config文件内容：
<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns="http://www.easck.com/.NetConfiguration/v2.0">
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
</startup>
<configProtectedData>
<providers>
<clear />
<add name="KeyProvider" type="System.Configuration.RsaProtectedConfigurationProvider, System.Configuration, Version=2.0.0.0,Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" keyContainerName="Key" useMachineContainer="true"/>
</providers>
</configProtectedData>
<connectionStrings configProtectionProvider="KeyProvider">
<EncryptedData Type="http://www.easck.com/2001/04/xmlenc#Element"
xmlns="http://www.easck.com/2001/04/xmlenc#">
<EncryptionMethod Algorithm="http://www.easck.com/2001/04/xmlenc#tripledes-cbc" />
<KeyInfo xmlns="http://www.easck.com/2000/09/xmldsig#">
<EncryptedKey xmlns="http://www.easck.com/2001/04/xmlenc#">
<EncryptionMethod Algorithm="http://www.easck.com/2001/04/xmlenc#rsa-1_5" />
<KeyInfo xmlns="http://www.easck.com/2000/09/xmldsig#">
<KeyName>Rsa Key</KeyName>
</KeyInfo>
<CipherData>
<CipherValue>lSLu2RVnlfr5om5MpBuqyhBETF6dI/glZ3zlfOQvzj+l1YmsOcfGVC1LgrDFcPLEbF/r1IZZYVnQuesz3AeVUkpNCG2OfMWDeaPULtJ5Ay24SYnBR4FNtQQSf1pijelXRGE8pzH7s49RLsKWQuwVTyMrOUoIMcmD4xIPmN/cqpQ=</CipherValue>
</CipherData>
</EncryptedKey>
</KeyInfo>
<CipherData>
<CipherValue>deXEhu/mqe+WkD51qXhi9jwBhEurU6EQXBQINOGOyDgpw/W4xTpi3DtTDcEzJXbaHvyKaXLfkPxxljce07ANtN7VXRfDov0Olsq/3+hkYqVXRI5A80XVkOKh2CQaVWx/GJC7JBbbRlKXJvS93M+OQWGKpW0twcZlL1ns97g5w8QstGN6vszAiZw1z6gKXlsrMf9224ExGq+dGJS9BSU+mxaKkd9EAVELMtWv2r7jIXsEneggDR49Mtdu91j1dsDj6am3NcaHmRQ=</CipherValue>
</CipherData>
</EncryptedData>
</connectionStrings>
</configuration>
