The man's jaw muscles were jumping but he answered quietly, "Dr. Harshaw, I am Captain Heinrich of the Federation S.S.  Bureau.  The fact that you reached me by calling the Executive Palace should be ample proof that I am who I say I am.  However-" He took out a wallet, flipped it open, and held it close to his own vision pickup.  The picture blurred, then quickly refocused.  Harshaw glanced at the I.  D. thus displayed; it looked authentic enough, he decided - especially as he did not care whether it was authentic or not.