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Please help <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Cryptanalytic_computer&action=edit">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">introducing citations to additional sources</a>.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Cryptanalytic+computer%22">"Cryptanalytic computer"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Cryptanalytic+computer%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Cryptanalytic+computer%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Cryptanalytic+computer%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Cryptanalytic+computer%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Cryptanalytic+computer%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">April 2024</span>)</i></span></div></td></tr></tbody></table> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:UNIVAC_1101_%22Atlas%22_cryptanalytic_installation.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/55/UNIVAC_1101_%22Atlas%22_cryptanalytic_installation.jpg/220px-UNIVAC_1101_%22Atlas%22_cryptanalytic_installation.jpg" decoding="async" width="220" height="182" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/55/UNIVAC_1101_%22Atlas%22_cryptanalytic_installation.jpg/330px-UNIVAC_1101_%22Atlas%22_cryptanalytic_installation.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/55/UNIVAC_1101_%22Atlas%22_cryptanalytic_installation.jpg/440px-UNIVAC_1101_%22Atlas%22_cryptanalytic_installation.jpg 2x" data-file-width="1010" data-file-height="835" /></a><figcaption><a href="/wiki/UNIVAC_1101" title="UNIVAC 1101">ATLAS</a> </figcaption></figure> <p>A <b>cryptanalytic computer</b> is a <a href="/wiki/Computer" title="Computer">computer</a> designed to be used for <a href="/wiki/Cryptanalysis" title="Cryptanalysis">cryptanalysis</a>, which nowadays involves massive statistical analysis and multiple trial decryptions that since before <a href="/wiki/World_War_II" title="World War II">World War II</a> are possible only with automated equipment. Polish cryptanalysts designed and built automated aids in their work on <a href="/wiki/Enigma_machine" title="Enigma machine">Enigma</a> traffic. Arguably, the first modern computer (digital, electronic, and somewhat programmable) was built for cryptanalytic work at <a href="/wiki/Bletchley_Park" title="Bletchley Park">Bletchley Park</a> (the <a href="/wiki/Colossus_computer" title="Colossus computer">Colossus</a>) during the war. More modern computers were important after World War II, and some machines (like the <a href="/wiki/Cray-1" title="Cray-1">Cray-1</a>) are reported<sup class="noprint Inline-Template" style="margin-left:0.1em; white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Manual_of_Style/Words_to_watch#Unsupported_attributions" title="Wikipedia:Manual of Style/Words to watch"><span title="The material near this tag may use weasel words or too-vague attribution. (March 2012)">according to whom?</span></a></i>]</sup> to have had machine instructions hardwired in at the request of <a href="/wiki/NSA" class="mw-redirect" title="NSA">NSA</a>. </p><p>Computers continue to be important in cryptanalysis well into the 21st century. NSA, in fact, is said to have the largest number of installed computers on the planet. Whether this is true in an age of <a href="/wiki/Google" title="Google">Google</a> computer farms and such is doubtful but remains publicly unknown.<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> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cryptanalytic_computer&action=edit&section=1" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Bomba_(cryptography)" title="Bomba (cryptography)">Bomba (cryptography)</a></li> <li><a href="/wiki/Bombe" title="Bombe">Bombe</a></li> <li><a href="/wiki/Colossus_computer" title="Colossus computer">Colossus computer</a></li> <li><a href="/wiki/Deep_crack" class="mw-redirect" title="Deep crack">Deep crack</a></li> <li><a href="/wiki/FROSTBURG" title="FROSTBURG">FROSTBURG</a></li> <li><a href="/wiki/IBM_7950_Harvest" title="IBM 7950 Harvest">IBM 7950 Harvest</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cryptanalytic_computer&action=edit&section=2" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFGladwin2007" class="citation journal cs1">Gladwin, Lee A. (2007-10-08). <a rel="nofollow" class="external text" href="http://www.tandfonline.com/doi/abs/10.1080/01611190701506022">"Bulldozer: A Cribless Rapid Analytical Machine (RAM) Solution to Enigma and its Variations"</a>. <i>Cryptologia</i>. <b>31</b> (4): 305–315. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1080%2F01611190701506022">10.1080/01611190701506022</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0161-1194">0161-1194</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:45817948">45817948</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Cryptologia&rft.atitle=Bulldozer%3A+A+Cribless+Rapid+Analytical+Machine+%28RAM%29+Solution+to+Enigma+and+its+Variations&rft.volume=31&rft.issue=4&rft.pages=305-315&rft.date=2007-10-08&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A45817948%23id-name%3DS2CID&rft.issn=0161-1194&rft_id=info%3Adoi%2F10.1080%2F01611190701506022&rft.aulast=Gladwin&rft.aufirst=Lee+A.&rft_id=http%3A%2F%2Fwww.tandfonline.com%2Fdoi%2Fabs%2F10.1080%2F01611190701506022&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACryptanalytic+computer" class="Z3988"></span></span> </li> </ol></div> <p><br /> </p> <style data-mw-deduplicate="TemplateStyles:r1012311289">.mw-parser-output .asbox{position:relative;overflow:hidden}.mw-parser-output .asbox table{background:transparent}.mw-parser-output .asbox p{margin:0}.mw-parser-output .asbox p+p{margin-top:0.25em}.mw-parser-output .asbox-body{font-style:italic}.mw-parser-output .asbox-note{font-size:smaller}.mw-parser-output .asbox .navbar{position:absolute;top:-0.75em;right:1em;display:none}</style><div role="note" class="metadata plainlinks asbox stub"><table role="presentation"><tbody><tr class="noresize"><td><span typeof="mw:File"><a href="/wiki/File:Emoji_u1f510.svg" class="mw-file-description"><img alt="Stub icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/35/Emoji_u1f510.svg/35px-Emoji_u1f510.svg.png" decoding="async" width="35" height="35" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/35/Emoji_u1f510.svg/53px-Emoji_u1f510.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/35/Emoji_u1f510.svg/70px-Emoji_u1f510.svg.png 2x" data-file-width="128" data-file-height="128" /></a></span></td><td><p class="asbox-body">This cryptography-related article is a <a href="/wiki/Wikipedia:Stub" title="Wikipedia:Stub">stub</a>. 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