You can sign your messages using HMAC[1]. That's what Facebook does when it makes HTTP requests to your application. [1] http://rc3.org/2011/12/02/using-hmac-t

You can sign your messages using HMAC[1]. That's what Facebook does when it makes HTTP requests to your application. [1] http://rc3.org/2011/12/02/using-hmac-to-authenticate-web-service-requests/ http://rc3.org/2011/12/02/using-hmac-to-authenticate-web-ser...