Encrypting web.config with RSA
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When I use aspnet_regiis to encrypt a web.config, the initial line says 

    configProtectionProvider="RsaProtectedConfigurationProvider"

and later down it says
  
    <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#tripledes-cbc" />


and further after that it says

    <EncryptedKey xmlns="http://www.w3.org/2001/04/xmlenc#">
          <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-1_5" />

I am confused why the tripledes line is in there when the provider is the RsaProtectedConfigurationProvider type. 