I need to send a password from a windows application to the web (asp.net) in order to automatically login the user on the web (e.g.: opening hotmail from windows live messenger).
I thought about hash code, but the problem is: the value will be stored on user browser history (querystring).
Anyone knows how to pass a one-time valid key (a key that is valid for only one use) using querystring? or any other solution?
Thanks
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