WW2 German Wotan signal encryption

dsr_at_Florence.edu
Date: 01/31/04 

Date: Sat, 31 Jan 2004 16:53:48 GMT

During WW2 the Germans used a ranging beam system code named "Wotan".
This system was used to guide bombers over England. Does anyone know
what kind of authentication method was used to prevent a MITM attack
from jamming the signal?

I was thinking some of the methods used to remove interference and
authenticate contemporary mobile and cell phone traffic may have been
developed back in WW2 to protect the Wotan signal?