如何在WCF中实现客户端和服务器之间的安全通信？

我需要实现一个模型，其中只有一组授权的客户端才能使用WCF服务器。我想到了在每个方法调用中将AUTH结构作为参数传递的东西。这是实现这种安全性的最佳方法，还是有更简单/更好的方法来实现这一点？

例如我开发并发布了如下服务：

http：// MyServer / MyService [ ^ ]

默认情况下，任何知道URL的人都可以使用该服务。

如何设置指定的客户端集可以使用URL。

另外我们如何确保没有人可以在通信之间更改数据。



例如：客户端发送请求平衡查询服务与响应500卢比，但有些人试图将其更改为500卢比。

I need to implement a model, where only an authorized set of clients can use a WCF server. I thought of something along passing an AUTH structure as a param inside each method call. Is this the best method to implement this kind of security, or is there an easier/better way of doing this?
for example i developed and publish the service like below:
http://MyServer/MyService[^]
By default any any one who know the URL can consume the service.
How i can set specified Set of client can consume the URL.
Also how can we assure no one can change the data between communication.

For eg: client send request for Balance Enquiry service with reponse 500 Rs but some one tried to change it to 500 Rs.