配置选项
| -pdf section webApplicationDirectory | 对指定物理（非虚拟）目录中的 Web.config 文件的指定配置节进行解密。 |
| -pef section webApplicationDirectory | 对指定物理（非虚拟）目录中的 Web.config 文件的指定配置节进行加密。 |
-pdf 和-pef 参数是对指定的物理目录里的Web.config文件进行加密，我们可以先将App.config文件改名为Web.config，通过这两个参数便可以“骗”过系统，让它将指定的配置节进行加密，我们只需要将加密后的文件名改回App.config即可，我们来实验一下：
第一步：先将目录下的App.config改名为Web.config。
第二步：打开SDK命令提示，输入命令：aspnet_regiis -pef "配置节" "目录"，以我的项目为例，加密前的config文件内容如下：
1
<?xml version="1.0" encoding="utf-8"?>
2<configuration>
3 <configSections>
4 <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />
5 </configSections>
6 <dataConfiguration defaultDatabase="Connection String" />
7 <connectionStrings>
8 <add name="Connection String" connectionString="Database=LocomotiveStat;Server=10.167.61.49;User ID=sa;Password=sa;"
9 providerName="System.Data.SqlClient" />
10 </connectionStrings>
11</configuration>
<?xml version="1.0" encoding="utf-8"?>2
<configuration>3
<configSections>4
<section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />5
</configSections>6
<dataConfiguration defaultDatabase="Connection String" />7
<connectionStrings>8
<add name="Connection String" connectionString="Database=LocomotiveStat;Server=10.167.61.49;User ID=sa;Password=sa;"9
providerName="System.Data.SqlClient" />10
</connectionStrings>11
</configuration>输入命令：aspnet_regiis -pef "connectionStrings" "E:\开发目录"，加密后的config文件内容如下：
1<?xml version="1.0" encoding="utf-8"?>
2<configuration>
3 <configSections>
4 <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />
5 </configSections>
6 <dataConfiguration defaultDatabase="Connection String" />
7 <connectionStrings configProtectionProvider="RsaProtectedConfigurationProvider">
8 <EncryptedData Type="http://www.w3.org/2001/04/xmlenc#Element"
9 xmlns="http://www.w3.org/2001/04/xmlenc#">
10 <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#tripledes-cbc" />
11 <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
12 <EncryptedKey xmlns="http://www.w3.org/2001/04/xmlenc#">
13 <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-1_5" />
14 <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
15 <KeyName>Rsa Key</KeyName>
16 </KeyInfo>
17 <CipherData>
18 <CipherValue>g2QFQqbHU1L6WUPYqjADqFAvHcdq/7dqCd1U9GlQFEi/nHDVHjqsWvjNywOZtQQg7Q/yW7g8xlRCo0h2+yYd/tQTNoVMu/RKdJmSjZMnmnwpWq+S2VEWK4U106JQwLCfBR/bAF4DHvG47B9KB0JbRfXBt5V2wJVaAI9u3kzuj50=</CipherValue>
19 </CipherData>
20 </EncryptedKey>
21 </KeyInfo>
22 <CipherData>
23 <CipherValue>blwV/ZW1izFZL80YL5RkcjrIjWkQ0L1gJhgZbxEzzTgOcT24ihrAnv3/rDCG+WIZ7TL5D/rMm7dQwkIsij1Sh3befg6F3+pxcW4oe1w/bovIKuzjs3tokUpBvTTj+fsCs2W/MWUhQaWMKQWkHfS2Ajt6gL6MTYtb3pfQUp0pdHbeRxoqdiAksQ1Zzsi1FtRTi7gTT7hnpF0pJs+W9mxTVDMO/qSZXfXLOEMIs/A5ExcfvR5GjpaPuDeLuSsCN3XtjaiXzaDQ3It7j+r66+L2C0xvEhbT9SsG</CipherValue>
24 </CipherData>
25 </EncryptedData>
26 </connectionStrings>
27</configuration>
<?xml version="1.0" encoding="utf-8"?>2
<configuration>3
<configSections>4
<section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />5
</configSections>6
<dataConfiguration defaultDatabase="Connection String" />7
<connectionStrings configProtectionProvider="RsaProtectedConfigurationProvider">8
<EncryptedData Type="http://www.w3.org/2001/04/xmlenc#Element"9
xmlns="http://www.w3.org/2001/04/xmlenc#">10
<EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#tripledes-cbc" />11
<KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">12
<EncryptedKey xmlns="http://www.w3.org/2001/04/xmlenc#">13
<EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-1_5" />14
<KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">15
<KeyName>Rsa Key</KeyName>16
</KeyInfo>17
<CipherData>18
<CipherValue>g2QFQqbHU1L6WUPYqjADqFAvHcdq/7dqCd1U9GlQFEi/nHDVHjqsWvjNywOZtQQg7Q/yW7g8xlRCo0h2+yYd/tQTNoVMu/RKdJmSjZMnmnwpWq+S2VEWK4U106JQwLCfBR/bAF4DHvG47B9KB0JbRfXBt5V2wJVaAI9u3kzuj50=</CipherValue>19
</CipherData>20
</EncryptedKey>21
</KeyInfo>22
<CipherData>23
<CipherValue>blwV/ZW1izFZL80YL5RkcjrIjWkQ0L1gJhgZbxEzzTgOcT24ihrAnv3/rDCG+WIZ7TL5D/rMm7dQwkIsij1Sh3befg6F3+pxcW4oe1w/bovIKuzjs3tokUpBvTTj+fsCs2W/MWUhQaWMKQWkHfS2Ajt6gL6MTYtb3pfQUp0pdHbeRxoqdiAksQ1Zzsi1FtRTi7gTT7hnpF0pJs+W9mxTVDMO/qSZXfXLOEMIs/A5ExcfvR5GjpaPuDeLuSsCN3XtjaiXzaDQ3It7j+r66+L2C0xvEhbT9SsG</CipherValue>24
</CipherData>25
</EncryptedData>26
</connectionStrings>27
</configuration>由此可见，我们已经完成了任务，现在只需要将Web.config文件名改回App.config即可，在应用程序项目中无需对该文件进行解密操作，.NET框架会自动替我们完成，如果想解密该文件也很简单，在SDK命令提示里输入aspnet_regiis -pdf "配置节" "目录"即可。