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<div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indhold" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Vis/skjul indholdsfortegnelsen" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Vis/skjul indholdsfortegnelsen</span> </label> <div class="vector-dropdown-content"> <div 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Bernstein</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Gå til en artikel på et andet sprog. Tilgængelig på 18 sprog" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-18" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">18 sprog</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AF%D8%A7%D9%86%D9%8A%D9%8A%D9%84_%D9%8A%D9%88%D9%84%D9%8A%D9%88%D8%B3_%D8%A8%D9%8A%D8%B1%D9%86%D8%B4%D8%AA%D8%A7%D9%8A%D9%86" title="دانييل يوليوس بيرنشتاين – arabisk" lang="ar" hreflang="ar" data-title="دانييل يوليوس بيرنشتاين" data-language-autonym="العربية" data-language-local-name="arabisk" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%AF%D8%A7%D9%86%D9%8A%D9%8A%D9%84_%D9%8A%D9%88%D9%84%D9%8A%D9%88%D8%B3_%D8%A8%D9%8A%D8%B1%D9%86%D8%B4%D8%AA%D8%A7%D9%8A%D9%86" title="دانييل يوليوس بيرنشتاين – Egyptian Arabic" lang="arz" hreflang="arz" data-title="دانييل يوليوس بيرنشتاين" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D8%AF%D9%86%DB%8C%D9%84_%D8%A8%D8%B1%D9%86%D8%B4%D8%AA%D8%A7%DB%8C%D9%86" title="دنیل برنشتاین – South Azerbaijani" lang="azb" hreflang="azb" data-title="دنیل برنشتاین" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Daniel_J._Bernstein" title="Daniel J. Bernstein – tysk" lang="de" hreflang="de" data-title="Daniel J. Bernstein" data-language-autonym="Deutsch" data-language-local-name="tysk" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Daniel_J._Bernstein" title="Daniel J. Bernstein – engelsk" lang="en" hreflang="en" data-title="Daniel J. Bernstein" data-language-autonym="English" data-language-local-name="engelsk" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Daniel_J._Bernstein" title="Daniel J. Bernstein – spansk" lang="es" hreflang="es" data-title="Daniel J. Bernstein" data-language-autonym="Español" data-language-local-name="spansk" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AF%D9%86%DB%8C%D9%84_%D8%A8%D8%B1%D9%86%D8%B4%D8%AA%D8%A7%DB%8C%D9%86" title="دنیل برنشتاین – persisk" lang="fa" hreflang="fa" data-title="دنیل برنشتاین" data-language-autonym="فارسی" data-language-local-name="persisk" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Daniel_J._Bernstein" title="Daniel J. Bernstein – fransk" lang="fr" hreflang="fr" data-title="Daniel J. Bernstein" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Daniel_Bernstein" title="Daniel Bernstein – haitisk" lang="ht" hreflang="ht" data-title="Daniel Bernstein" data-language-autonym="Kreyòl ayisyen" data-language-local-name="haitisk" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Daniel_J._Bernstein" title="Daniel J. Bernstein – italiensk" lang="it" hreflang="it" data-title="Daniel J. Bernstein" data-language-autonym="Italiano" data-language-local-name="italiensk" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%80%E3%83%8B%E3%82%A8%E3%83%AB%E3%83%BB%E3%83%90%E3%83%BC%E3%83%B3%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%B3" title="ダニエル・バーンスタイン – japansk" lang="ja" hreflang="ja" data-title="ダニエル・バーンスタイン" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%8C%80%EB%8B%88%EC%96%BC_J._%EB%B2%88%EC%8A%A4%ED%83%80%EC%9D%B8" title="대니얼 J. 번스타인 – koreansk" lang="ko" hreflang="ko" data-title="대니얼 J. 번스타인" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Daniel_J._Bernstein" title="Daniel J. Bernstein – nederlandsk" lang="nl" hreflang="nl" data-title="Daniel J. Bernstein" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Daniel_J._Bernstein" title="Daniel J. Bernstein – polsk" lang="pl" hreflang="pl" data-title="Daniel J. Bernstein" data-language-autonym="Polski" data-language-local-name="polsk" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Daniel_J._Bernstein" title="Daniel J. Bernstein – svensk" lang="sv" hreflang="sv" data-title="Daniel J. Bernstein" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%94%D0%B0%D0%BD%D1%96%D0%B5%D0%BB%D1%8C_%D0%94%D0%B6%D1%83%D0%BB%D1%96%D1%83%D1%81_%D0%91%D0%B5%D1%80%D0%BD%D1%88%D1%82%D0%B0%D0%B9%D0%BD" title="Даніель Джуліус Бернштайн – ukrainsk" lang="uk" hreflang="uk" data-title="Даніель Джуліус Бернштайн" data-language-autonym="Українська" data-language-local-name="ukrainsk" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Daniel_J._Bernstein" title="Daniel J. Bernstein – usbekisk" lang="uz" hreflang="uz" data-title="Daniel J. 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(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data div{background:#1f1f23!important;color:#f8f9fa}}</style><table class="infobox biography vcard"><tbody><tr><th colspan="2" class="infobox-above fn org" style="background: #ecf4fc; padding-top:0.3em; padding-bottom:0.3em; font-size:140%; line-height: 130%;">Daniel J. Bernstein</th></tr><tr><td colspan="2" class="infobox-image"><span typeof="mw:File"><a href="/wiki/Fil:Dan_Bernstein_27C3.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Dan_Bernstein_27C3.jpg/200px-Dan_Bernstein_27C3.jpg" decoding="async" width="200" height="300" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Dan_Bernstein_27C3.jpg/300px-Dan_Bernstein_27C3.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Dan_Bernstein_27C3.jpg/399px-Dan_Bernstein_27C3.jpg 2x" data-file-width="2856" data-file-height="4288" /></a></span> <div class="infobox-caption"> <small>29. december 2010</small></div></td></tr><tr><th colspan="2" class="infobox-header" style="background: #ecf4fc;">Personlig information</th></tr><tr><th scope="row" class="infobox-label" style="vertical-align:top;">Født</th><td class="infobox-data" style="vertical-align:top;"><a href="/wiki/29._oktober" title="29. oktober">29. oktober </a><a href="/wiki/1971" title="1971">1971</a> (53 år) <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q92865#P569" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/5px-Blue_pencil.svg.png" decoding="async" width="5" height="5" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/8px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span><br />East Patchogue, <a href="/wiki/New_York_(delstat)" title="New York (delstat)">New York</a>, <a href="/wiki/USA" title="USA">USA</a> <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q92865#P19" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/5px-Blue_pencil.svg.png" decoding="async" width="5" height="5" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/8px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></td></tr><tr><th colspan="2" class="infobox-header" style="background: #ecf4fc;">Uddannelse og virke</th></tr><tr><th scope="row" class="infobox-label" style="vertical-align:top;">Uddannelsessted</th><td class="infobox-data" style="vertical-align:top;">Bellport High School<small></small>,<br /><a href="/wiki/University_of_California,_Berkeley" title="University of California, Berkeley">University of California, Berkeley</a><small></small>,<br />Courant Institute of Mathematical Sciences, NYU<small></small> <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q92865#P69" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/5px-Blue_pencil.svg.png" decoding="async" width="5" height="5" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/8px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="vertical-align:top;">Beskæftigelse</th><td class="infobox-data" style="vertical-align:top;">Universitetsunderviser<small></small>, kryptolog<small></small>, <a href="/wiki/Matematiker" title="Matematiker">matematiker</a><small></small>, <a href="/wiki/Programm%C3%B8r" title="Programmør">programmør</a><small></small>, datalog<small></small> <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q92865#P106" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/5px-Blue_pencil.svg.png" decoding="async" width="5" height="5" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/8px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="vertical-align:top;">Fagområde</th><td class="infobox-data" style="vertical-align:top;"><a href="/wiki/Datalogi" title="Datalogi">Datalogi</a>, <a href="/wiki/Matematik" title="Matematik">matematik</a> <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q92865#P101" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/5px-Blue_pencil.svg.png" decoding="async" width="5" height="5" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/8px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="vertical-align:top;">Arbejdsgiver</th><td class="infobox-data" style="vertical-align:top;">Tekniske Universitet Eindhoven<small></small>, Ruhr-Universität Bochum<small></small>, University of Illinois at Chicago<small></small> <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q92865#P108" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/5px-Blue_pencil.svg.png" decoding="async" width="5" height="5" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/8px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="vertical-align:top;">Kendte værker</th><td class="infobox-data" style="vertical-align:top;">Ucspi-tcp<small></small>, NaCl<small></small>, <a href="/wiki/Qmail" title="Qmail">qmail</a><small></small>, Djbdns<small></small>, Daemontools<small></small> med flere <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q92865#P800" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/5px-Blue_pencil.svg.png" decoding="async" width="5" height="5" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/8px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></td></tr><tr><th colspan="2" class="infobox-header" style="background: #ecf4fc;">Eksterne henvisninger</th></tr><tr><td colspan="2" class="infobox-full-data" style="vertical-align:top;"><a rel="nofollow" class="external text" href="https://cr.yp.to/djb.html">Daniel J. Bernsteins hjemmeside</a> <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q92865#P856" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/5px-Blue_pencil.svg.png" decoding="async" width="5" height="5" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/8px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></td></tr><tr><td colspan="2" class="infobox-below" style="border-top: 1px solid #aaa; line-height: 1.5em"><small><small>Information med symbolet <span class="mw-valign-text-top" typeof="mw:File/Frameless"><span><img alt="Billede af blyant" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/8px-Blue_pencil.svg.png" decoding="async" width="8" height="8" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/12px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/16px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span> hentes fra <a href="https://www.wikidata.org/wiki/" class="extiw" title="d:">Wikidata</a>. <span style="white-space:nowrap">Kildehenvisninger foreligger sammesteds.</span></small></small><br /><div style="text-align: right;"><span typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q92865" title="d:Q92865"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Wikidata-logo_S.svg/20px-Wikidata-logo_S.svg.png" decoding="async" width="20" height="11" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Wikidata-logo_S.svg/30px-Wikidata-logo_S.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Wikidata-logo_S.svg/40px-Wikidata-logo_S.svg.png 2x" data-file-width="1050" data-file-height="590" /></a></span> <small>[<a href="https://www.wikidata.org/wiki/Q92865" class="extiw" title="d:Q92865"> redigér på Wikidata</a> ] <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q92865" title="Rediger på Wikidata"><img alt="Rediger på Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/5px-Blue_pencil.svg.png" decoding="async" width="5" height="5" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/8px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></small></div></td></tr></tbody></table> <p><b>Daniel Julius Bernstein</b> (<b>D.J. Bernstein</b> eller bare <b>djb</b>, født <a href="/wiki/29._oktober" title="29. oktober">29. oktober</a> <a href="/wiki/1971" title="1971">1971</a>) er en amerikansk matematiker, <a href="/wiki/Kryptologi" title="Kryptologi">kryptolog</a>, <a href="/wiki/Programmering" title="Programmering">programmør</a> og forsker. D.J. Bernstein er ansat som professor i <a href="/wiki/Datalogi" title="Datalogi">datalogi</a> ved <a href="/w/index.php?title=University_of_Illinois&action=edit&redlink=1" class="new" title="University of Illinois (ikke skrevet endnu)">University of Illinois</a> i <a href="/wiki/Chicago" title="Chicago">Chicago</a>. Han er forfatter til en mængde <a href="/wiki/Open_source" title="Open source">open source</a>-software hvoraf de mest populære er <a href="/wiki/Qmail" title="Qmail">qmail</a> og <a href="/w/index.php?title=Djbdns&action=edit&redlink=1" class="new" title="Djbdns (ikke skrevet endnu)">djbdns</a>. Han er desuden kendt for sin indflydelse på udviklingen af moderne <a href="/wiki/Kryptografi" title="Kryptografi">kryptografi</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Bernstein_mod_USA">Bernstein mod USA</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Daniel_J._Bernstein&veaction=edit&section=1" title="Redigér afsnit: Bernstein mod USA" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Daniel_J._Bernstein&action=edit&section=1" title="Edit section's source code: Bernstein mod USA"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Bernstein førte en retssag mod USA under titlen <i><a href="/w/index.php?title=Bernstein_v._United_States&action=edit&redlink=1" class="new" title="Bernstein v. United States (ikke skrevet endnu)">Bernstein v. United States</a></i>. Her fik han medhold i at software i USA skal beskyttes under ytringsfrihed ved <a href="/wiki/USA%27s_forfatning" title="USA's forfatning">den første forfatningsændring</a>, samtidigt med at nationale begrænsninger blev hævet, så man i USA godt må eksportere <a href="/wiki/Krypteringsalgoritme" title="Krypteringsalgoritme">krypteringssoftware</a>. </p><p>Bernstein blev oprindeligt repræsenteret i retten af <a href="/wiki/Electronic_Frontier_Foundation" title="Electronic Frontier Foundation">Electronic Frontier Foundation</a> (EFF), men begyndte efterfølgende at repræsentere sig selv på trods af at han ikke har nogen baggrund i jura. </p> <div class="mw-heading mw-heading2"><h2 id="Softwaresikkerhed">Softwaresikkerhed</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Daniel_J._Bernstein&veaction=edit&section=2" title="Redigér afsnit: Softwaresikkerhed" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Daniel_J._Bernstein&action=edit&section=2" title="Edit section's source code: Softwaresikkerhed"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Bernsteins filosofi om softwaresikkerhed er at placere programmer i såkaldte <i><a href="/w/index.php?title=Sandkasse_(datalogi)&action=edit&redlink=1" class="new" title="Sandkasse (datalogi) (ikke skrevet endnu)">ekstreme sandkasser</a></i> hvorfra de ikke kan andet end at konvertere input til output. I tilfælde hvor man svært kan afgrænse programmer fra at have privilegier, fx til styring af <a href="/wiki/Server" title="Server">servere</a> på internettet, bør programmer skrives sikkert. </p><p>Som konsekvens har Bernstein udlovet en pengepræmie, først på $500 og dernæst på $1.000, til hvem end som kan finde sikkerhedsfejl i softwaren qmail og djbdns. Dette er sket en enkelt gang selvom de to programmer har eksisteret siden hhv. 1995 og 2001. Til sammenligning har programmerne som de erstatter, hhv. <a href="/w/index.php?title=Sendmail&action=edit&redlink=1" class="new" title="Sendmail (ikke skrevet endnu)">Sendmail</a> og <a href="/w/index.php?title=BIND&action=edit&redlink=1" class="new" title="BIND (ikke skrevet endnu)">BIND</a>, haft hundredvis af sikkerhedsfejl igennem tiden. </p><p>Bernstein underviste i 2004 på et kursus om computersikkerhed med titlen <i>UNIX security holes</i>. I løbet af kurset fandt hans 16 kursusdeltagere 91 nye sikkerhedshuller i <a href="/wiki/UNIX" title="UNIX">UNIX-lignende styresystemer</a>. Bernstein valgte som tilhænger af princippet om <a href="/w/index.php?title=Fuld_offentligg%C3%B8relse&action=edit&redlink=1" class="new" title="Fuld offentliggørelse (ikke skrevet endnu)">fuld offentliggørelse</a> at annoncere 44 af dem sammen med eksempelkode på hvordan hullerne kunne misbruges. </p> <div class="mw-heading mw-heading2"><h2 id="Matematik_og_kryptografi">Matematik og kryptografi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Daniel_J._Bernstein&veaction=edit&section=3" title="Redigér afsnit: Matematik og kryptografi" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Daniel_J._Bernstein&action=edit&section=3" title="Edit section's source code: Matematik og kryptografi"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Bernstein har udgivet en række videnskabelige artikler inden for matematik og beregninger (datalogi). Mange af hans artikler handler om <a href="/wiki/Algoritme" title="Algoritme">algoritmer</a> eller hvordan man skal implementere dem effektivt, men de dækker også over <a href="/wiki/Talteori" title="Talteori">talteori</a>, matematisk analyse, kryptologisk analyse af computerhardware, <a href="/w/index.php?title=Elliptisk_kurve-kryptografi&action=edit&redlink=1" class="new" title="Elliptisk kurve-kryptografi (ikke skrevet endnu)">elliptisk kurve-kryptografi</a>, </p><p>Bernstein har blandt andet lavet Salsa20, som er et krypteringschiffer til at kryptere strømme af data. Han har også lavet hash-funktionen CubeHash og komprimeringsfunktionen Rumba20, som bygger på Salsa20-krypteringssystemet. </p><p>Bernstein har udgivet et softwarebibliotek, <i>DJBFFT</i>, til effektiv beregning af de såkaldte <a href="/wiki/Fast_Fourier_Transform" title="Fast Fourier Transform">hurtige Fourier-transformationer</a> (eng. FFT). Han har også udgivet et program, <i>primegen</i>, som effektivt primtalsfaktoriserer ved hjælp af <a href="/w/index.php?title=Atkins_primtalsalgoritme&action=edit&redlink=1" class="new" title="Atkins primtalsalgoritme (ikke skrevet endnu)">Atkins primtalsalgoritme</a>. </p><p>I 2012 udgav Bernstein krypteringsbiblioteket <i><a href="/w/index.php?title=NaCl_(software)&action=edit&redlink=1" class="new" title="NaCl (software) (ikke skrevet endnu)">Network and Cryptography library (NaCl)</a></i>, som for sjov udtales "salt" (da den kemiske betegnelse for bordsalt er Natrium-Clorid). NaCl er ment som en erstatning til det meget populære krypteringsbibliotek <a href="/wiki/OpenSSL" title="OpenSSL">OpenSSL</a>. Det er designet primært ud fra at lette brugeren af biblioteket fra at skulle træffe beslutninger om hvilke krypteringsalgoritmer man bør bruge i en givet sammenhæng. Det minimerer derved mængden af ting der kan kompromittere sikkerheden. </p> <dl><dd><i>Læs evt. om <a href="/w/index.php?title=Softwarebibliotek&action=edit&redlink=1" class="new" title="Softwarebibliotek (ikke skrevet endnu)">softwarebiblioteker</a>.</i></dd></dl> <div class="mw-heading mw-heading2"><h2 id="Internetprotokoller">Internetprotokoller</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Daniel_J._Bernstein&veaction=edit&section=4" title="Redigér afsnit: Internetprotokoller" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Daniel_J._Bernstein&action=edit&section=4" title="Edit section's source code: Internetprotokoller"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dd><i>Se artikel: <a href="/wiki/Internetprotokol" title="Internetprotokol">Internetprotokol</a>.</i></dd></dl> <p>Bernstein foreslog protokollen <i>Internet Mail 2000</i> som alternativ til de protokoller som benyttes til email i dag: <i><a href="/wiki/SMTP" class="mw-redirect" title="SMTP">Simple Mail Transfer Protocol</a></i> (SMTP), <i><a href="/wiki/POP3" title="POP3">Post Office Protocol</a></i> (POP3) og <i><a href="/wiki/IMAP" title="IMAP">Internet Message Access Protocol</a></i> (IMAP). Den primære forskel i Bernsteins protokol er at afsenderen har ansvaret for at opbevare emails i stedet for modtageren, lidt ligesom hvordan hjemmesider opbevares hos udbyderen af hjemmesiden. Et af formålene med denne protokol var at reducere mængden af <a href="/wiki/Spam" title="Spam">spam</a>. </p><p>I et forsøg på at sikre <a href="/wiki/Domain_Name_System" title="Domain Name System">domænenavnesystemet</a> (DNS) foreslog Bernstein i august 2008 et alternativ til de sikkerhedsmekanismer, som går under navnet <a href="/w/index.php?title=DNSSEC&action=edit&redlink=1" class="new" title="DNSSEC (ikke skrevet endnu)">DNSSEC</a>. Bernsteins <a href="/w/index.php?title=DNSCurve&action=edit&redlink=1" class="new" title="DNSCurve (ikke skrevet endnu)">DNSCurve</a> bestod i at bruge elliptisk kurve-kryptografi i stedet for den mere gængse <a href="/wiki/RSA" title="RSA">RSA</a> <a href="/wiki/Krypteringsalgoritme" title="Krypteringsalgoritme">public key-kryptografi</a>, da det ville spare en masse beregningsressourcer. </p> <div class="mw-heading mw-heading2"><h2 id="Se_også"><span id="Se_ogs.C3.A5"></span>Se også</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Daniel_J._Bernstein&veaction=edit&section=5" title="Redigér afsnit: Se også" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Daniel_J._Bernstein&action=edit&section=5" title="Edit section's source code: Se også"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Kryptografi" title="Kryptografi">Kryptografi</a></li> <li><a href="/wiki/Bruce_Schneier" title="Bruce Schneier">Bruce Schneier</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Eksterne_henvisninger">Eksterne henvisninger</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Daniel_J._Bernstein&veaction=edit&section=6" title="Redigér afsnit: Eksterne henvisninger" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Daniel_J._Bernstein&action=edit&section=6" title="Edit section's source code: Eksterne henvisninger"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://cr.yp.to/">Officiel hjemmeside</a></li></ul> <table class="box-Ingen_kilder plainlinks metadata ambox ambox-content ambox-Ingen-kilder" role="presentation"><tbody><tr><td class="mbox-image"><div style="width:52px"><span typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Broom_icon.svg/40px-Broom_icon.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Broom_icon.svg/60px-Broom_icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Broom_icon.svg/80px-Broom_icon.svg.png 2x" data-file-width="400" data-file-height="400" /></span></span></div></td><td class="mbox-text"><div class="mbox-text-span"><b>Der er ingen <a href="/wiki/Wikipedia:Kildeangivelser" title="Wikipedia:Kildeangivelser">kildehenvisninger</a> i denne artikel</b>, <a href="/wiki/Wikipedia:Verificerbarhed" title="Wikipedia:Verificerbarhed">hvilket er et problem</a>.<span class="hide-when-compact"> Du kan hjælpe ved at angive kilder til de påstande, der fremføres. 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