Securing connection string in web.config is very important, while searching i found some simple methodes, for this you should be in the following directory:
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727>
For encryption:
aspnet_regiis.exe -pef "connectionStrings" "path of the site root directory" -prov "encryption provider"
Types of encryption provider:
DataProtectionConfigurationProvider
RSAProtectedConfigurationProvider
DPAPIProtectedConfigurationProvider
for e.g
aspnet_regiis.exe -pef "connectionStrings" "C:\Inetpub\wwwroot\bwl" -prov "DataProtectionConfigurationProvider"
For decryption:
aspnet_regiis.exe -pdf "connectionStrings" "path of the site root directory"
aspnet_regiis.exe -pdf "connectionStrings" "C:\Inetpub\wwwroot\bwl"
Thats all.
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connection string, web.config