Silverlight Forms Authentication & WCF token Creation

I have silverlight login page, where i am taking username, password passing it to WCF service and in WCF service i am trying to validate with AD... once i got validated i am sending response to Silverlight ui saying user exists or bool value true...  once i get true user got access to application.. but now i want to add some security token i.e. once i validate user with AD in WCF service i want to create a token.. i don';t have any idea how to create a token what exactly it does. I came to know every time i make a call to service from silverlight i have to pass that token and check weather still token is active or not... can any one provide some sample creating token, how to access that in each of silverlight page, how to pass to service call?
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.