How can I encrypt to message in WCF?

[C# Programming]

My WCF properly working when SecurityMode.None. If I switch to SecurityMode.Message so it is not work in client side. My main problem is how can I encrypt to message in WCF?

Following code OK, its work;

Host Side Code
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NetTcpBinding tcpBinding = new NetTcpBinding(SecurityMode.None);

Uri tcpUri = new Uri("net.tcp://10.0.105.240:7070/HesaplamaServisi");

ServiceHost host = new ServiceHost(typeof(Hesaplayici), tcpUri);

host.Description.Behaviors.Add(new ServiceMetadataBehavior());

host.AddServiceEndpoint(typeof(IHesaplamalar), tcpBinding, "net.tcp://10.0.105.240:7070/HesaplamaServisi");

host.AddServiceEndpoint(typeof(IMetadataExchange), System.ServiceModel.Description.MetadataExchangeBindings.CreateMexTcpBinding(), "mex");

host.Open();



Client Side Code
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NetTcpBinding tcpBinding = new NetTcpBinding(SecurityMode.None);

IHesaplamalar proxy = ChannelFactory.CreateChannel(tcpBinding, new EndpointAddress("net.tcp://10.0.105.240:7070/HesaplamaServisi/"));



FOLLOWING NOT WORK
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I want encrypt to message, so I add following code both side;

NetTcpBinding tcpBinding = new NetTcpBinding(SecurityMode.Message);

tcpBinding.Security.Message.AlgorithmSuite = System.ServiceModel.Security.SecurityAlgorithmSuite.TripleDesSha256Rsa15;

This code properly work when Host and Client same PC, If client.exe run another PC in same network this code not work. What can I do? Thanks...