How to encrypt query string for .NET

http://www.webpronews.com/expertarticles/2007/01/25/aspnet-httpmodule-for-query-string-encryption

http://nayyeri.net/blog/how-to-encrypt-query-string-parameters-in-asp.net/

http://blog.madskristensen.dk/post/HttpModule-for-query-string-encryption.aspx