In early 1940, newly hired mathematicians at OKW/ln7 discovered the weakness that it introduced.The procedure would eventually be abandonned by the Germans on , but by that time WWII had already started and the British had beome involved in codebreaking (see below) [10].More importantly though, the Enigma A and B were very expensive to build and would only be suitable for the high-end market.For this reason, Scherbius developed a machine that produced its output on a lamp panel rather than on paper.

It was part of a proposal on how to use the commercial Enigma.

This fact was discovered in 2003 and is described in detail in a paper by Karl de Leeuw [2].

Officially though, the Enigma machine was invented by Arthur Scherbius in 1918, right at the end of World War I.

In 1938 they see an increase in the number of messages sent by the Germans and it seems clear that Germany is preparing for war.

All this time, the Germans have been using a common Grundstellung (basic setting) for all Enigma traffic.