Single sign on for application in different domain using different validation keyss
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Hi, i have three asp.net applications in different domains say www.domain1.com and www.domain2.com and www.domain3.aspx. Two pages are there in each applications .First LogIn.aspx and other MyPage.aspx. In mypage of www.domain1.com, i have a link to mypage.aspx of www.domain2.aspx and www.domain3.aspx. now my requiremets are: 1> when user login in www.domain1.aspx, and clicks any link on MyPage.aspx, say he clicks www.domain2.aspx, then he shud be redirected to Mypage.aspx of www.domain2.aspx. it shud not show him its login page .same for www.domain3.aspx.i have to use forms authentication. Its basicly a single sign on. The problem i am facing excatly is that, i acieved this using same machinekey,validationkey for all in web.config like decryptionKey="F9D1A2D3E1D3E2F7B3D9F90FF3965ABDAC304902F8D923AC" validation="SHA1" /> But i need that the validation keys should be different for different applicatons in there web.config ,and when i click the links from www.domain1.aspx then anyways i save it in the formauthetication cookie and also i want to add some more information in formauthentication cookie. Please help me in this. Its urgent.Any other way to get this functionality achieved ia also welcome thx