C# - winform - How to encrypt endpoint address in app.config [duplicate]

This question already has answers here: Closed 11 years ago. 开发者_运维技巧

Possible Duplicate:

WCF Encryption solution for App.config viewable to a client?

In my application, I use a webservice to authenticate member, I found out that .NET store endpoint address of the webservice in app.exe.config file. So I think it's very easy if someone can create another web service and change the configuation file, he can login to my app.

Please help,

Thanks

Now I'll implement something like this to source

this._dataService = new DataServiceSoapClient();
if (this._dataService.Endpoint.ListenUri.ToString() != "myURLofWebservice")
{
   //error
}

I think it solves my problem

Thank you all for your helps

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Well, it is also easy to use http sniffer to see, where application does requests, so encrypting endpoint address is also not a solution.
I think better way to do this, that webservice would sign request using private key and application would check signature using public key.
There are many examples of this, like http://blogs.msdn.com/b/alejacma/archive/2008/02/21/how-to-sign-a-message-and-verify-a-message-signature-c.aspx