{"id":12336,"date":"2026-09-21T06:02:39","date_gmt":"2026-09-21T03:02:39","guid":{"rendered":"https:\/\/kreablog.com\/tarihte-yazilan-ilk-sifreleme-algoritmasi\/"},"modified":"2026-09-21T06:02:39","modified_gmt":"2026-09-21T03:02:39","slug":"tarihte-yazilan-ilk-sifreleme-algoritmasi","status":"publish","type":"post","link":"https:\/\/kreablog.com\/tr\/tarihte-yazilan-ilk-sifreleme-algoritmasi\/","title":{"rendered":"Tarihte Yaz\u0131lan \u0130lk \u015eifreleme Algoritmas\u0131"},"content":{"rendered":"<p>\u0130lk \u015fifreleme algoritmas\u0131 bir sunucu odas\u0131ndan ortaya \u00e7\u0131kmad\u0131. Hatta 20. y\u00fczy\u0131ldan bile de\u011fildi. Ancak nihayet dijital bi\u00e7ime kavu\u015ftu\u011funda, her \u015feyi sessizce yeniden \u015fekillendirdi bankac\u0131l\u0131\u011f\u0131, mahremiyeti, sava\u015f\u0131 ve bug\u00fcn bildi\u011fimiz \u015fekliyle t\u00fcm interneti. Bu b\u00fcy\u00fck bir iddia. Ayn\u0131 zamanda tamamen do\u011fru.<\/p>\n<p>\u00c7o\u011fu insan \u015fifrelemenin modern bir icat oldu\u011funu d\u00fc\u015f\u00fcn\u00fcr. \u00d6yle de\u011fildir. \u0130nsanlar binlerce y\u0131ld\u0131r mesajlar\u0131n\u0131 gizlemi\u015flerdir. Peki, bilgisayarlar i\u00e7in \u00f6zel olarak yaz\u0131lm\u0131\u015f ilk resmi, matematiksel algoritma ne zaman ortaya \u00e7\u0131kt\u0131? \u0130\u015fte bu, \u00e7ok daha ayr\u0131nt\u0131l\u0131 ve \u00e7ok daha ilgin\u00e7 bir hik\u00e2ye.<\/p>\n<h2>Her \u015eeyin Ba\u015flang\u0131c\u0131 Olan \u015eifreleme Algoritmas\u0131<\/h2>\n<p>1970\u2019lerin ba\u015f\u0131nda, IBM ara\u015ft\u0131rmac\u0131s\u0131 Horst Feistel\u2019in \u00e7\u0131lg\u0131n bir fikri vard\u0131. Bir makinenin otomatik olarak \u00e7al\u0131\u015ft\u0131rabilece\u011fi bir \u015fifreleme y\u00f6ntemi geli\u015ftirmek istiyordu. Bir insan de\u011fil. Bir makine. Tasar\u0131m\u0131, Feistel \u015fifreleme yap\u0131s\u0131 olarak tan\u0131nd\u0131. Zarif, tekrarlanabilir ve son derece zekice bir tasar\u0131md\u0131.<\/p>\n<p>Feistel&#8217;in temel fikri basit ama dahiceydi. Bir veri blo\u011funu ikiye b\u00f6l\u00fcyorsunuz. Ard\u0131ndan yar\u0131s\u0131n\u0131 bir i\u015flevden ge\u00e7iriyorsunuz. Sonra iki yar\u0131y\u0131 yer de\u011fi\u015ftiriyorsunuz. Sonra bunu tekrarl\u0131yorsunuz. Kula\u011fa neredeyse s\u0131k\u0131c\u0131 geliyor. Ancak bu tekrarlama, o d\u00f6nem i\u00e7in neredeyse k\u0131r\u0131lmaz bir \u015fey ortaya \u00e7\u0131kard\u0131.<\/p>\n<p>IBM, Feistel&#8217;in yap\u0131s\u0131n\u0131 kullanarak Lucifer adl\u0131 bir \u015fifreleme algoritmas\u0131 geli\u015ftirdi. Bu algoritma, DES (Veri \u015eifreleme Standard\u0131) algoritmas\u0131n\u0131n do\u011frudan atas\u0131yd\u0131. 1977 y\u0131l\u0131nda ABD h\u00fck\u00fcmeti, DES\u2019i \u00fclkenin ilk standartla\u015ft\u0131r\u0131lm\u0131\u015f \u015fifreleme algoritmas\u0131 olarak resmen benimsedi. Bu, \u015f\u00fcphesiz bir d\u00fcnya ilkiydi.<\/p>\n<h3>Anahtar Uzunlu\u011fu Neden Kavgaya Neden Oldu?<\/h3>\n<p>\u0130\u015fte size kimsenin s\u00f6ylemedi\u011fi k\u0131s\u0131m. IBM, Lucifer\u2019\u0131 ba\u015flang\u0131\u00e7ta 64 bitlik bir anahtarla tasarlam\u0131\u015ft\u0131. NSA devreye girdi. IBM\u2019den anahtar\u0131 56 bite indirmesini istediler. G\u00f6r\u00fcn\u00fc\u015fte k\u00fc\u00e7\u00fck olan bu de\u011fi\u015fiklik, b\u00fcy\u00fck bir tart\u0131\u015fma yaratt\u0131. Ele\u015ftirmenler, NSA\u2019n\u0131n bir arka kap\u0131 a\u00e7mak istedi\u011finden \u015f\u00fcpheleniyordu. Gizlice kendilerinin k\u0131rabilece\u011fi kadar k\u0131sa bir anahtar istiyorlard\u0131.<\/p>\n<p>Tart\u0131\u015fma y\u0131llarca s\u00fcrd\u00fc. Sonunda, 1998 y\u0131l\u0131nda Elektronik S\u0131n\u0131r Vakf\u0131 (Electronic Frontier Foundation), Deep Crack ad\u0131nda bir makine geli\u015ftirdi. Bu makine, 56 bitlik bir DES anahtar\u0131n\u0131 sadece 22 saatte k\u0131rd\u0131. Ele\u015ftirenler ba\u015f\u0131ndan beri hakl\u0131 \u00e7\u0131km\u0131\u015ft\u0131. O an, \u00f6nemli bir ger\u00e7e\u011fi ortaya koydu: Anahtar uzunlu\u011fu sadece teknik bir ayr\u0131nt\u0131 de\u011fildir. Bu, siyasi bir karard\u0131r.<\/p>\n<h3>Feistel\u2019in Sessiz Miras\u0131<\/h3>\n<p>Horst Feistel hi\u00e7bir zaman herkesin bildi\u011fi bir isim olmad\u0131. Ancak onun geli\u015ftirdi\u011fi yap\u0131 her yerde kar\u015f\u0131m\u0131za \u00e7\u0131k\u0131yor. Bu yap\u0131, g\u00fcn\u00fcm\u00fcz\u00fcn k\u00fcresel \u015fifreleme standard\u0131 olan AES\u2019i etkiledi. Taray\u0131c\u0131n\u0131z\u0131n bankan\u0131zla nas\u0131l ileti\u015fim kurdu\u011funu \u015fekillendirdi. Hatta modern \u015fifre y\u00f6neticileri bile onun orijinal fikrinin devam\u0131 niteli\u011findeki \u00e7\u00f6z\u00fcmleri kullan\u0131yor. 1990 y\u0131l\u0131nda, internetin onun \u00e7al\u0131\u015fmalar\u0131n\u0131 en \u00f6nemli hale getirmesinden hemen \u00f6nce vefat etti. \u0130\u015fte tarih, i\u015fte bu t\u00fcr ironileri sever.<\/p>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/kreablog.com\/wp-content\/uploads\/2026\/09\/the-first-encryption-algorithm-ever-written-inline.jpg\" alt=\"Tarihte Yaz\u0131lan \u0130lk \u015eifreleme Algoritmas\u0131\"><\/figure>\n<h2>\u015eifreleme Algoritmas\u0131 \u0130nterneti Nas\u0131l De\u011fi\u015ftirdi?<\/h2>\n<p>DES ortaya \u00e7\u0131kmadan \u00f6nce, dijital ileti\u015fim temelde a\u00e7\u0131kt\u0131. Bir kabloya eri\u015fimi olan herkes, \u00fczerinde ne oldu\u011funu okuyabilirdi. Bankalar finansal verileri d\u00fcz metin olarak g\u00f6nderiyordu. Devlet kurumlar\u0131 ise ba\u015fka hi\u00e7 kimsenin do\u011frulayamad\u0131\u011f\u0131 \u00f6zel sistemler kullan\u0131yordu. Bu, d\u00fczen kisvesi alt\u0131nda bir kaosdu.<\/p>\n<p>DES bunu de\u011fi\u015ftirdi. \u0130lk kez, kamuya a\u00e7\u0131k ve hakem denetiminden ge\u00e7mi\u015f bir \u015fifreleme algoritmas\u0131 ortaya \u00e7\u0131kt\u0131. Herkes bunu inceleyebilirdi. Herkes bunu denetleyebilirdi. Bu a\u00e7\u0131kl\u0131k devrim niteli\u011findeydi. Bu, g\u00fcvenin y\u00f6ntemin gizli kalmas\u0131na de\u011fil, yaln\u0131zca anahtar\u0131n gizli kalmas\u0131na ba\u011fl\u0131 oldu\u011fu anlam\u0131na geliyordu. Bu fikir, bug\u00fcn h\u00e2l\u00e2 internetin temelini olu\u015fturuyor.<\/p>\n<p>\u00c7\u0131\u011f\u0131r a\u00e7an teknolojik yenilikler hakk\u0131nda daha fazla bilgiyi tam da burada, <a title=\"kreablog\" href=\"https:\/\/kreablog.com\/tr\">KREAblog\u2019da <\/a>bulabilirsiniz. G\u00fcnl\u00fck hayat\u0131m\u0131zda s\u0131radan g\u00f6rd\u00fc\u011f\u00fcm\u00fcz ara\u00e7lar\u0131n ard\u0131ndaki hik\u00e2yeler, neredeyse her zaman bekledi\u011fimizden daha ilgin\u00e7tir.<\/p>\n<h3>\u015eifrelemenin Yayg\u0131nla\u015ft\u0131\u011f\u0131 An<\/h3>\n<p>1994 y\u0131l\u0131nda Netscape, SSL (Secure Sockets Layer) protokol\u00fcn\u00fc piyasaya s\u00fcrd\u00fc. Bu protokol, Feistel ve DES ekibinin ortaya koydu\u011fu ilkeler \u00fczerine in\u015fa edilmi\u015fti. Birdenbire, s\u0131radan insanlar da endi\u015fe duymadan \u00e7evrimi\u00e7i al\u0131\u015fveri\u015f yapmaya ba\u015flad\u0131lar. Taray\u0131c\u0131larda asma kilit simgesi belirdi. Milyonlarca ki\u015fi, kredi kart\u0131 bilgilerini internete g\u00fcvenerek vermeye ba\u015flad\u0131.<\/p>\n<p>\u015eu asma kilit mi? O, New York\u2019taki bir IBM laboratuvar\u0131nda geli\u015ftirilen, delikli kart d\u00f6nemine ait bir algoritman\u0131n do\u011frudan miras\u00e7\u0131s\u0131d\u0131r. Feistel\u2019in not defterinden taray\u0131c\u0131n\u0131z\u0131n HTTPS ba\u011flant\u0131s\u0131na uzanan zincir \u015fa\u015f\u0131rt\u0131c\u0131 derecede k\u0131sad\u0131r. Dolay\u0131s\u0131yla, bir dahaki sefere o k\u00fc\u00e7\u00fck kilidi g\u00f6rd\u00fc\u011f\u00fcn\u00fczde Horst\u2019u hat\u0131rlay\u0131n. Bunu hak etti.<\/p>\n<h3>DES Neden Sonunda \u00c7\u00f6kt\u00fc ve Ard\u0131ndan Neler Oldu?<\/h3>\n<p>1990\u2019lar\u0131n sonlar\u0131na gelindi\u011finde, DES\u2019in a\u00e7\u0131k\u00e7a yetersiz kald\u0131\u011f\u0131 ortaya \u00e7\u0131km\u0131\u015ft\u0131. Bilgisayarlar \u00e7ok h\u0131zl\u0131 hale gelmi\u015fti. 56 bitlik anahtar art\u0131k yeterli de\u011fildi. Bunun \u00fczerine ABD h\u00fck\u00fcmeti a\u00e7\u0131k bir yar\u0131\u015fma d\u00fczenledi. D\u00fcnyan\u0131n d\u00f6rt bir yan\u0131ndan ekipler yeni algoritmalar sundu. Bu, esasen k\u00fcresel bir kod yazma turnuvas\u0131yd\u0131.<\/p>\n<p>2001 y\u0131l\u0131nda bir Bel\u00e7ikal\u0131 ekip yar\u0131\u015fmay\u0131 kazand\u0131. Bu ekibin geli\u015ftirdi\u011fi Rijndael algoritmas\u0131, AES (Geli\u015fmi\u015f \u015eifreleme Standard\u0131) olarak hayata ge\u00e7ti. Bu algoritma g\u00fcn\u00fcm\u00fczde h\u00e2l\u00e2 k\u0131r\u0131lamam\u0131\u015ft\u0131r. Ancak DES olmasayd\u0131 AES de var olamazd\u0131. DES ise Feistel\u2019in orijinal yap\u0131s\u0131 olmasayd\u0131 var olamazd\u0131. Modern dijital gizlili\u011fin her katman\u0131, elli y\u0131l\u0131 a\u015fk\u0131n bir s\u00fcre \u00f6nce bir IBM laboratuvar\u0131nda yaz\u0131lan o ilk resmi \u015fifreleme algoritmas\u0131na kadar uzanmaktad\u0131r.<\/p>\n<h2>Bunun Asl\u0131nda Ne Anlama Geldi\u011fi<\/h2>\n<p>\u0130lk \u015fifreleme algoritmas\u0131 sadece teknik bir d\u00f6n\u00fcm noktas\u0131 de\u011fildi. Ayn\u0131 zamanda felsefi bir d\u00f6n\u00fc\u015f\u00fcmd\u00fc. \u015eu mesaj\u0131 y\u00fcksek sesle ve net bir \u015fekilde verdi: S\u0131rlar sadece h\u00fck\u00fcmetlere de\u011fil, insanlara aittir. Bu fikir h\u00e2l\u00e2 tart\u0131\u015fma konusudur. \u015eifreleme arka kap\u0131lar\u0131 hakk\u0131ndaki tart\u0131\u015fmalar bug\u00fcn de mahkemelerde ve Kongre\u2019de devam etmektedir.<\/p>\n<p>Ancak g\u00f6zden ka\u00e7mas\u0131 kolay olan bir nokta var. Bu tart\u0131\u015fma, yaln\u0131zca bir ara\u015ft\u0131rmac\u0131n\u0131n algoritmay\u0131 kamuya a\u00e7\u0131k ve denetlenebilir hale getirmeye karar vermesi sayesinde ortaya \u00e7\u0131kt\u0131. Feistel bunu gizli tutmu\u015f olsayd\u0131, algoritmaya kar\u015f\u0131 \u00e7\u0131kacak ara\u00e7lara asla sahip olamazd\u0131k. \u015eeffafl\u0131k, hesap verebilirli\u011fi sa\u011flad\u0131. Hesap verebilirlik ise g\u00fcveni m\u00fcmk\u00fcn k\u0131ld\u0131. Bu \u00f6nemsiz bir \u015fey de\u011fil. Bu, dijital d\u00fcnyan\u0131n temelidir.<\/p>\n<p>1973\u2019ten kalma bir blok \u015fifreleme algoritmas\u0131n\u0131n, insanl\u0131k tarihinin en \u00e7ok siyasi anlam y\u00fckl\u00fc icatlar\u0131ndan biri haline gelece\u011fini kim tahmin edebilirdi? Art\u0131k biliyorsunuz.<\/p>\n<p><em>Bu makale yaln\u0131zca bilgilendirme ama\u00e7l\u0131d\u0131r.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tarihte yaz\u0131lm\u0131\u015f ilk \u015fifreleme algoritmas\u0131, insanlar\u0131n s\u0131rlar\u0131n\u0131 saklama bi\u00e7imini de\u011fi\u015ftirdi. \u0130\u015fte her \u015feyin ba\u015flang\u0131c\u0131 olan bu kodun ard\u0131ndaki \u015fa\u015f\u0131rt\u0131c\u0131 hik\u00e2ye.<\/p>\n","protected":false},"author":5,"featured_media":12335,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_aioseo_title":"Tarihte Yaz\u0131lan \u0130lk \u015eifreleme Algoritmas\u0131","_aioseo_description":"Tarihte yaz\u0131lm\u0131\u015f ilk \u015fifreleme algoritmas\u0131, insanlar\u0131n s\u0131rlar\u0131n\u0131 saklama bi\u00e7imini de\u011fi\u015ftirdi. \u0130\u015fte her \u015feyin ba\u015flang\u0131c\u0131 olan bu kodun ard\u0131ndaki \u015fa\u015f\u0131rt\u0131c\u0131 hik\u00e2ye.","_aioseo_keyphrases":"","_video_image1":"","_video_image2":"","jnews-multi-image_gallery":[],"jnews_single_post":[],"jnews_primary_category":[],"jnews_override_counter":[],"footnotes":""},"categories":[957],"tags":[],"class_list":["post-12336","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dunyada-ilkler"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Tarihte yaz\u0131lm\u0131\u015f ilk \u015fifreleme algoritmas\u0131, insanlar\u0131n s\u0131rlar\u0131n\u0131 saklama bi\u00e7imini de\u011fi\u015ftirdi. \u0130\u015fte her \u015feyin ba\u015flang\u0131c\u0131 olan bu kodun ard\u0131ndaki \u015fa\u015f\u0131rt\u0131c\u0131 hik\u00e2ye.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"KREAblog02\"\/>\n\t<meta name=\"google-site-verification\" 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