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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Frank Rowlett</span></h1>
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<p><b>Frank Byron Rowlett</b> (* <a href="2._Mai" title="2. Mai">2. Mai</a> <a href="1908" title="1908">1908</a> in Rose Hill, <a href="Lee_County_(Virginia)" title="Lee County (Virginia)">Lee County</a>, <a href="Virginia" title="Virginia">Virginia</a>; † <a href="29._Juni" title="29. Juni">29. Juni</a> <a href="1998" title="1998">1998</a> <a href="Gaithersburg" title="Gaithersburg">Gaithersburg</a>, <a href="Maryland" title="Maryland">Maryland</a><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>) war ein <a href="US-amerikanisch" class="mw-redirect" title="US-amerikanisch">US-amerikanischer</a> <a href="Mathematiker" title="Mathematiker">Mathematiker</a> und <a href="Kryptologe" class="mw-redirect" title="Kryptologe">Kryptologe</a>.
</p><p>1930 wurde der Mathematik-Lehrer <i>Frank B. Rowlett</i> einer der ersten Mitarbeiter des <a href="Signals_Intelligence_Service" class="mw-redirect" title="Signals Intelligence Service">Signals Intelligence Service</a> (SIS) unter <a href="William_Friedman" title="William Friedman">William Friedman</a>, einer Militärabteilung, welche sich damals in erster Linie mit der Entwicklung von Chiffriertechniken für die US-Armee beschäftigte. 1936 war er mit <a href="Solomon_Kullback" title="Solomon Kullback">Solomon Kullback</a> an der Entzifferung des mit Maschinen (Codename Red) verschlüsselten diplomatischen Nachrichtenverkehrs der Japaner beteiligt.
</p><p>Im <a href="Zweiter_Weltkrieg" title="Zweiter Weltkrieg">Zweiten Weltkrieg</a> war Rowlett gemeinsam mit William Friedman maßgeblich an der Entwicklung einer Maschine zur <a href="Chiffrierung" class="mw-redirect" title="Chiffrierung">Verschlüsselung</a> militärischer Nachrichten der <a href="United_States_Navy" title="United States Navy">US-Marine</a> beteiligt, die als <a href="SIGABA" class="mw-redirect" title="SIGABA">SIGABA</a> bezeichnet wurde.
</p><p>Nach dem Krieg war er bei der 1952 gegründeten <a href="National_Security_Agency" title="National Security Agency">NSA</a> Leiter der Kryptanalyse.
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<div class="mw-heading mw-heading2"><h2 id="Einzelnachweise">Einzelnachweise</h2></div>
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<li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.nytimes.com/1998/07/02/us/frank-b-rowlett-90-wizard-in-making-and-breaking-codes.html"><i>Frank B. Rowlett, 90, Wizard In Making and Breaking Codes</i></a> Nachruf in <a href="The_New_York_Times" title="The New York Times">The New York Times</a>, abgerufen am 13. Oktober 2019</span>
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