{"id":9028,"date":"2025-01-09T00:45:10","date_gmt":"2025-01-08T21:45:10","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/dogum-gunu-paradoksu-ve-online-guvenlik\/"},"modified":"2025-01-09T00:45:10","modified_gmt":"2025-01-08T21:45:10","slug":"dogum-gunu-paradoksu-ve-online-guvenlik","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/dogum-gunu-paradoksu-ve-online-guvenlik\/","title":{"rendered":"Do\u011fum G\u00fcn\u00fc Paradoksu ve Online G\u00fcvenlik"},"content":{"rendered":"<p><body><\/p>\n<p>Do\u011fum G\u00fcn\u00fc Paradoksu ve Online G\u00fcvenlik<\/p>\n<p>Do\u011fum g\u00fcn\u00fc paradoksu, kula\u011fa paradoks gibi gelse de asl\u0131nda olduk\u00e7a basit bir olas\u0131l\u0131k problemidir.  Bu paradoks, belirli say\u0131da insan\u0131n bir araya geldi\u011finde, en az ikisinin ayn\u0131 g\u00fcne do\u011fum g\u00fcn\u00fcn\u00fcn denk gelme olas\u0131l\u0131\u011f\u0131n\u0131n tahmin edilenden \u00e7ok daha y\u00fcksek oldu\u011funu g\u00f6sterir.  \u00d6rne\u011fin,  23 ki\u015finin bir odada bulunmas\u0131 durumunda, en az iki ki\u015finin ayn\u0131 do\u011fum g\u00fcn\u00fcne sahip olma olas\u0131l\u0131\u011f\u0131 %50&#8217;nin \u00fczerindedir.  Bu durum, ilk bak\u0131\u015fta \u015fa\u015f\u0131rt\u0131c\u0131 gelse de, olas\u0131l\u0131k hesaplamalar\u0131yla kolayca a\u00e7\u0131klanabilir.<\/p>\n<p>Peki bu paradoks, online g\u00fcvenli\u011fimizle nas\u0131l ilgilidir?  Bu noktada, kriptografi alan\u0131nda kullan\u0131lan hash fonksiyonlar\u0131 devreye girer.  Hash fonksiyonlar\u0131, herhangi bir uzunluktaki veriyi sabit uzunlukta bir diziye (hash de\u011feri) d\u00f6n\u00fc\u015ft\u00fcren algoritmalard\u0131r.  G\u00fcvenli bir hash fonksiyonu, farkl\u0131 verilerin ayn\u0131 hash de\u011ferine sahip olma olas\u0131l\u0131\u011f\u0131n\u0131 (\u00e7arp\u0131\u015fma) son derece d\u00fc\u015f\u00fck tutmal\u0131d\u0131r.  Do\u011fum g\u00fcn\u00fc paradoksu ise, bu \u00e7arp\u0131\u015fma olas\u0131l\u0131\u011f\u0131n\u0131n tahmin edilenden daha y\u00fcksek oldu\u011funu g\u00f6sterir.  Yani, hash fonksiyonlar\u0131n\u0131n g\u00fcvenli\u011fini de\u011ferlendirirken, do\u011fum g\u00fcn\u00fc paradoksunu g\u00f6z \u00f6n\u00fcnde bulundurmak son derece \u00f6nemlidir.<\/p>\n<p>\u00d6rne\u011fin, 128 bitlik bir hash de\u011feri kullanan bir sistem ele alal\u0131m.  Bu sistemde 2<sup>64<\/sup> farkl\u0131 hash de\u011feri \u00fcretmek m\u00fcmk\u00fcnd\u00fcr.  \u0130lk bak\u0131\u015fta bu say\u0131 olduk\u00e7a b\u00fcy\u00fck g\u00f6r\u00fcn\u00fcr ve \u00e7arp\u0131\u015fma olas\u0131l\u0131\u011f\u0131 ihmal edilebilir gibi gelebilir.  Ancak, do\u011fum g\u00fcn\u00fc paradoksu gere\u011fi,  yakla\u015f\u0131k 2<sup>64<\/sup>&#8216;\u00fcn karek\u00f6k\u00fc kadar (yakla\u015f\u0131k 2<sup>32<\/sup>) farkl\u0131 veri giri\u015fi ile \u00e7arp\u0131\u015fma olas\u0131l\u0131\u011f\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde artar.  Bu da,  g\u00fcvenli\u011fin d\u00fc\u015f\u00fcr\u00fclmesine neden olabilir.<\/p>\n<p>Sonu\u00e7 olarak,  do\u011fum g\u00fcn\u00fc paradoksu, online g\u00fcvenlik sistemlerinin tasar\u0131m\u0131nda ve analizinde dikkate al\u0131nmas\u0131 gereken \u00f6nemli bir fakt\u00f6rd\u00fcr.  G\u00fcvenli bir sistem tasar\u0131m\u0131 i\u00e7in, hash fonksiyonlar\u0131n\u0131n yeterli uzunlukta olmas\u0131 ve \u00e7arp\u0131\u015fma olas\u0131l\u0131\u011f\u0131n\u0131 minimize edecek \u015fekilde se\u00e7ilmesi gerekir.  Daha uzun hash de\u011ferleri kullanmak, \u00e7arp\u0131\u015fma olas\u0131l\u0131\u011f\u0131n\u0131 azaltarak g\u00fcvenli\u011fi art\u0131r\u0131r.  Bu nedenle, kriptografik sistemlerin g\u00fcvenli\u011fini de\u011ferlendirirken, yaln\u0131zca hash fonksiyonunun g\u00fcc\u00fc de\u011fil, ayn\u0131 zamanda do\u011fum g\u00fcn\u00fc paradoksunun da g\u00f6z \u00f6n\u00fcnde bulundurulmas\u0131 gerekmektedir.<\/p>\n<p>Daha fazla bilgi i\u00e7in,  <a href=\"https:\/\/fatihsoysal.com\">Fatih Soysal&#8217;\u0131n sitesini<\/a> ziyaret edebilirsiniz.  Ayr\u0131ca, konu hakk\u0131nda daha derinlemesine bilgi edinmek i\u00e7in <a href=\"https:\/\/dev.to\/connoranastasio\/the-birthday-paradox-a-statistical-breakdown-and-how-it-relates-to-online-security-52ac\">bu makaleye<\/a> g\u00f6z atabilirsiniz.<\/p>\n<p>Umar\u0131m bu makale, do\u011fum g\u00fcn\u00fc paradoksunu ve online g\u00fcvenlik \u00fczerindeki etkisini anlamada size yard\u0131mc\u0131 olmu\u015ftur.  Ba\u015fka sorular\u0131n\u0131z varsa, l\u00fctfen bana ula\u015fmaktan \u00e7ekinmeyin.  Herhangi bir konuda yard\u0131m gereksiniminiz varsa benimle ileti\u015fime ge\u00e7ebilirsiniz.<\/p>\n<h3>#Etiketler<\/h3>\n<p>#Do\u011fumG\u00fcn\u00fcParadoksu #OnlineG\u00fcvenlik #Kriptografi #HashFonksiyonlar\u0131 #\u00c7arp\u0131\u015fma #Olas\u0131l\u0131k #\u0130statistik #G\u00fcvenlik #SiberG\u00fcvenlik #FatihSoysal<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Do\u011fum G\u00fcn\u00fc Paradoksu ve Online G\u00fcvenlik Do\u011fum g\u00fcn\u00fc paradoksu, kula\u011fa paradoks gibi gelse de asl\u0131nda olduk\u00e7a basit bir&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-9028","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Do\u011fum G\u00fcn\u00fc Paradoksu ve Online G\u00fcvenlik<\/title>\n<meta name=\"description\" content=\"Do\u011fum g\u00fcn\u00fc paradoksu, kula\u011fa paradoks gibi gelse de asl\u0131nda olduk\u00e7a basit bir olas\u0131l\u0131k problemidir. Bu paradoks, belirli say\u0131da insan\u0131n bir araya geldi\u011finde, en az ikisinin ayn\u0131 g\u00fcne do\u011fum g\u00fcn\u00fcn\u00fcn denk gelme olas\u0131l\u0131\u011f\u0131n\u0131n tahmin edilenden \u00e7ok daha y\u00fcksek oldu\u011funu g\u00f6sterir. \u00d6rne\u011fin, 23 ki\u015finin bir odada bulunmas\u0131 durumunda, en az iki ki\u015finin ayn\u0131 do\u011fum g\u00fcn\u00fcne sahip olma olas\u0131l\u0131\u011f\u0131 &#039;nin \u00fczerindedir. Bu durum, ilk bak\u0131\u015fta \u015fa\u015f\u0131rt\u0131c\u0131 gelse de, olas\u0131l\u0131k hesaplamalar\u0131yla kolayca a\u00e7\u0131klanabilir.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/dogum-gunu-paradoksu-ve-online-guvenlik\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Do\u011fum G\u00fcn\u00fc Paradoksu ve Online G\u00fcvenlik\" \/>\n<meta property=\"og:description\" content=\"Do\u011fum g\u00fcn\u00fc paradoksu, kula\u011fa paradoks gibi gelse de asl\u0131nda olduk\u00e7a basit bir olas\u0131l\u0131k problemidir. Bu paradoks, belirli say\u0131da insan\u0131n bir araya geldi\u011finde, en az ikisinin ayn\u0131 g\u00fcne do\u011fum g\u00fcn\u00fcn\u00fcn denk gelme olas\u0131l\u0131\u011f\u0131n\u0131n tahmin edilenden \u00e7ok daha y\u00fcksek oldu\u011funu g\u00f6sterir. \u00d6rne\u011fin, 23 ki\u015finin bir odada bulunmas\u0131 durumunda, en az iki ki\u015finin ayn\u0131 do\u011fum g\u00fcn\u00fcne sahip olma olas\u0131l\u0131\u011f\u0131 &#039;nin \u00fczerindedir. Bu durum, ilk bak\u0131\u015fta \u015fa\u015f\u0131rt\u0131c\u0131 gelse de, olas\u0131l\u0131k hesaplamalar\u0131yla kolayca a\u00e7\u0131klanabilir.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/dogum-gunu-paradoksu-ve-online-guvenlik\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-01-08T21:45:10+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dogum-gunu-paradoksu-ve-online-guvenlik\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dogum-gunu-paradoksu-ve-online-guvenlik\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Do\u011fum G\u00fcn\u00fc Paradoksu ve Online G\u00fcvenlik\",\"datePublished\":\"2025-01-08T21:45:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dogum-gunu-paradoksu-ve-online-guvenlik\/\"},\"wordCount\":510,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/dogum-gunu-paradoksu-ve-online-guvenlik\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dogum-gunu-paradoksu-ve-online-guvenlik\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/dogum-gunu-paradoksu-ve-online-guvenlik\/\",\"name\":\"Do\u011fum G\u00fcn\u00fc Paradoksu ve Online G\u00fcvenlik\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-01-08T21:45:10+00:00\",\"description\":\"Do\u011fum g\u00fcn\u00fc paradoksu, kula\u011fa paradoks gibi gelse de asl\u0131nda olduk\u00e7a basit bir olas\u0131l\u0131k problemidir. 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