If you have done nothing wrong; you have nothing to hide: nothing to fear.
Wer nichts zu verbergen hat, hat auch nichts zu befürchten
Who has nothing to hide, has also nothing to fear
Joseph Goebbels
Reich Minister of Public Enlightenment and Propaganda, 1933-1945
Reich Plenipotentiary for Total War, 1944-1945
Chancellor of the German Reich, 1945
A sales pitch of the surveillance state.