encrypt SQL connectionstring c#

Question

I created an c# application (not asp webpage) which connects to a sql 2005 server. In my sourcecode the password and userid for this sql-server is coded plain text in Connec

Answer 1

There are two ways of doing it:

1) You can use Configuration Secure Section to encrypt and decrypt connection strimng from your source code:

try
    {
        // Open the configuration file and retrieve 
        // the connectionStrings section.
        Configuration config = ConfigurationManager.
            OpenExeConfiguration(exeConfigName);

        ConnectionStringsSection section =
            config.GetSection("connectionStrings")
            as ConnectionStringsSection;

        if (section.SectionInformation.IsProtected)
        {
            // Remove encryption.
            section.SectionInformation.UnprotectSection();
        }
        else
        {
            // Encrypt the section.
            section.SectionInformation.ProtectSection(
                "DataProtectionConfigurationProvider");
        }
        // Save the current configuration.
        config.Save();

        Console.WriteLine("Protected={0}",
            section.SectionInformation.IsProtected);
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.Message);
    }

2) You can Enterprise Library Data Access Application Block to perform the encryption using RSAProtectedConfigurationProvider or DPAPIProtectedConfigurationProvider.

For a full articvle go to --> http://msdn.microsoft.com/en-us/library/89211k9b(VS.80).aspx