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..

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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.