# THE COMMERCIAL ENIGMA: BEGINNINGS OF MACHINE CRYPTOGRAPHY

@article{Kruh2002THECE, title={THE COMMERCIAL ENIGMA: BEGINNINGS OF MACHINE CRYPTOGRAPHY}, author={Louis Kruh and Cipher A. Deavours}, journal={Cryptologia}, year={2002}, volume={26}, pages={1 - 16} }

A brief history and description of the first four models of the Enigma cipher machine, designed for the commercial market, taken in part from the authors' book [1].

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Figure 8. I (above) Model D and II (below) Model D with lid removed

- Figure 8. I (above) Model D and II (below) Model D with lid removed