how to generate valid code-signing certificate in a keychain for iphone procedure?

i am done with my iphone application.Now i ju开发者_JAVA百科st want to make a binary file of the application...For that i need a code signing certificate.. as i know i can make it with "code signing certificate" or "iphone developer" or "iphone distribution"... So i just wanna add anew certificate out there... so can anyone help me with that plz tell me the procedure.......

thanx in advance..

go to developer center and use Certificate Assistant from there. It explains all. Remember to create your public and private keys in Keychain before doing other steps.