in 1947, <a href="https://en.wikipedia.org/wiki/William_Lutwiniak" class="extiw" title="w:William Lutwiniak">Bill Lutwiniak</a> was a cryptographer with the <a href="https://en.wikipedia.org/wiki/Signal_Intelligence_Service" class="extiw" title="w:Signal Intelligence Service">Signal Intelligence Service</a>, working at <a href="https://en.wikipedia.org/wiki/Arlington_Hall" class="extiw" title="w:Arlington Hall">Arlington Hall</a>.
Unknown author<span style="display: none;">Unknown author</span>
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