WCF username without certificate

Question

I\'m working on a project where I need the following.

• WCF service on the server side (.NET 3.5)
• WPF client for the client side (.NET 3.0)

Answer 1

Short answer; you can't. As soon as you use username/password you need some sort of secure channel.

However you don't need certificates on the clients; only on the server.