{"id":1190,"date":"2018-12-11T16:57:37","date_gmt":"2018-12-11T14:57:37","guid":{"rendered":"https:\/\/www.guzel.net.tr\/blog\/?p=1190"},"modified":"2018-12-11T16:57:37","modified_gmt":"2018-12-11T14:57:37","slug":"blockchain-teknolojisi-nedir","status":"publish","type":"post","link":"https:\/\/www.guzel.net.tr\/blog\/genel\/blockchain-teknolojisi-nedir.html","title":{"rendered":"Blockchain Teknolojisi Nedir?"},"content":{"rendered":"

T\u00fcrk\u00e7e anlam\u0131yla blok zinciri olarak bilinen Blockchain teknolojisini k\u0131saca tan\u0131mlayacak olursak \u015fifrelenmi\u015f bir \u015fekilde veri y\u00f6netimi sa\u011flayan da\u011f\u0131n\u0131k yap\u0131da olu\u015fturulmu\u015f bir veritaban\u0131 sistemidir. Blockchain teknolojisinde her kullan\u0131c\u0131 a\u011fa, arada ba\u015fka bir arac\u0131 olmadan kolayca ba\u011flanabilir, yeni i\u015flemler ger\u00e7ekle\u015ftirebilir ve bloklar olu\u015fturabilir. Buna benzer bir sistem olarak Wikipedia\u2019y\u0131 \u00f6rnek g\u00f6sterebiliriz. T\u0131pk\u0131 Wikipedia\u2019da oldu\u011fu gibi, Blockchain teknolojisi kullanarak internet eri\u015fimi olan her bilgisayar ile veri taban\u0131ndaki bilgi kay\u0131tlar\u0131na bir veri girebilir ve di\u011fer kullan\u0131c\u0131lar bu bilgi kay\u0131tlar\u0131n\u0131n ne y\u00f6nde de\u011fi\u015ftirildi\u011fini g\u00f6rebilir. Her bilginin geli\u015fmi\u015f \u015fifreleme algoritmalar\u0131yla, bloklar halinde birbirine ba\u011flanarak kaydedildi\u011fi bu da\u011f\u0131n\u0131k veri taban\u0131, bir merkeze ba\u011fl\u0131 olmaks\u0131z\u0131n bizlere i\u015flem yapabilme olana\u011f\u0131 sunmaktad\u0131r. Bu sayede t\u00fcm i\u015flemler al\u0131c\u0131 ile sat\u0131c\u0131 aras\u0131nda g\u00fcvenli bir \u015fekilde ger\u00e7ekmektedir.<\/p>\n

Blockchain teknolojisinin ilk b\u00fcy\u00fck uygulamas\u0131, 2009 y\u0131l\u0131nda piyasaya s\u00fcr\u00fclen Bitcoin oldu. Bitcoin bir kripto para birimidir ve Blockchain onu destekleyen teknolojidir.\u00a0Bir kripto para birimi, bir Blockchain \u00fczerinde \u00e7al\u0131\u015fan bir dijital jetona kar\u015f\u0131l\u0131k gelir. Blockchain’in bitcoin ile nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 anlamak, teknolojinin para d\u0131\u015f\u0131ndaki di\u011fer bir\u00e7ok ger\u00e7ek d\u00fcnya kullan\u0131m durumlar\u0131na nas\u0131l aktar\u0131labilece\u011fini g\u00f6rebilmenizi sa\u011flayacakt\u0131r.<\/p>\n

\"\"<\/a><\/p>\n

Bitcoin \u00c7al\u0131\u015fma Mant\u0131\u011f\u0131<\/b><\/p>\n

Bitcoin blok zinciri \u201cmerkezi olmayan\u201d d\u0131r, yani bir merkezi otorite taraf\u0131ndan kontrol edilmemektedir. Geleneksel para birimleri merkez bankalar\u0131 taraf\u0131ndan verilirken, Bitcoin merkezi bir otoriteye sahip de\u011fildir.\u00a0Bunun yerine, Bitcoin Blockchain madencileri olarak bilinen insanlar\u0131n s\u00fcrd\u00fcrd\u00fc\u011f\u00fc bir halk a\u011f\u0131 taraf\u0131ndan korunur. A\u011f \u00fczerinde \u201cd\u00fc\u011f\u00fcmler\u201d olarak adland\u0131r\u0131lan bu \u201cmadenciler\u201d, bir i\u015flemin ger\u00e7ekle\u015fmesi i\u00e7in karma\u015f\u0131k matematiksel problemleri \u00e7\u00f6zmek i\u00e7in yar\u0131\u015fan ve bu amaca y\u00f6nelik bilgisayarlar\u0131 kullanan insanlard\u0131r.<\/p>\n

\u00d6rne\u011fin, bir\u00e7ok insan\u0131n Bitcoin i\u015flemleri yapt\u0131\u011f\u0131n\u0131 varsayal\u0131m.\u00a0Her i\u015flem bir \u201c\u00f6zel anahtar\u201d olan bir c\u00fczdandan meydana gelir. Bu bir dijital imzad\u0131r ve yap\u0131lan i\u015flemin c\u00fczdan\u0131n sahibinden geldi\u011fine dair matematiksel bir kan\u0131t sa\u011flar. Bu imza i\u015flemi bir kez tan\u0131mland\u0131ktan sonra ba\u015fka kullan\u0131c\u0131lar taraf\u0131ndan de\u011fi\u015ftirilebilmesini engellenir. B\u00fct\u00fcn i\u015flemler kullan\u0131c\u0131lar aras\u0131nda yay\u0131nlan\u0131r ve \u00e7o\u011funlukla 10-15 dakika i\u00e7erisinde\u00a0madencilik diye adland\u0131r\u0131lan i\u015flem a\u011f taraf\u0131ndan onaylanmaya ba\u015flar.<\/p>\n

\u015eimdi t\u00fcm d\u00fcnyada \u00e7ok say\u0131da i\u015flem ger\u00e7ekle\u015ftirildi\u011fini hayal edin.\u00a0Bu bireysel i\u015flemler, s\u0131k\u0131 kriptografik kurallar ile d\u00fczenlenen bir blok halinde toplan\u0131r.\u00a0Blok, y\u00fcksek g\u00fc\u00e7l\u00fc bilgisayar kullanan ki\u015filerden olu\u015fan Bitcoin a\u011f\u0131na g\u00f6nderilir.\u00a0Bu bilgisayarlar karma\u015f\u0131k matematiksel bulmacalar\u0131 \u00e7\u00f6zmeye \u00e7al\u0131\u015farak i\u015flemleri do\u011frulamak i\u00e7in yar\u0131\u015f\u0131rlar. Kazanan, Bitcoin’de bir \u00f6d\u00fcl al\u0131r. Madencilik ayr\u0131ca herkesin kolayca ard arda yeni bloklar\u0131 blok zincirine eklemesini engelleyerek rekabet seviyesi y\u00fcksek bir piyangonun muadilini de olu\u015fturur. Bu sayede kimse blok zincirine neyin dahil olup olmad\u0131\u011f\u0131n\u0131 denetleyemez ve blok zincirinin bu b\u00f6l\u00fcmlerini de\u011fi\u015ftirip harcad\u0131klar\u0131 paralar\u0131 geri alamazlar.<\/p>\n

Bitcoin hakk\u0131nda bilinmesi gereken baz\u0131 ger\u00e7ekler:<\/b><\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Bir merkezi otorite taraf\u0131ndan verilmez.<\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Bitcoin’in 21 milyonluk bir s\u0131n\u0131r vard\u0131r.<\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u015eu anda sadece 17 milyondan fazla Bitcoin dola\u015f\u0131mdad\u0131r.<\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Bitcoin kullanan ilk i\u015flemin, 2010 y\u0131l\u0131nda Papa John’un iki adet pizzas\u0131na 10.000 Bitcoin harcayan Laszlo Hanyecz adl\u0131 bir programc\u0131 taraf\u0131ndan ger\u00e7ekle\u015ftirildi\u011fine inan\u0131l\u0131yor.<\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Bitcoin yarat\u0131c\u0131s\u0131 Satoshi Nakamoto’nun kimli\u011fi bir gizem olmaya devam ediyor.<\/p>\n

\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Ayr\u0131ca Bitcoin, uyu\u015fturucu gibi yasa d\u0131\u015f\u0131 \u00fcr\u00fcnleri sat\u0131n almak i\u00e7in s\u0131kl\u0131kla kullan\u0131lmaktad\u0131r.<\/p>\n

Art\u0131lar\u0131 Ve Eksileri<\/b><\/p>\n

Art\u0131lar\u0131:<\/b><\/p>\n

Bitcoin para ta\u015f\u0131mak i\u00e7in gereksiz yere karma\u015f\u0131k bir s\u00fcre\u00e7 gibi g\u00f6r\u00fcnebilir.\u00a0Ancak blok zincirinin avantajlar\u0131 vard\u0131r. Geleneksel \u00f6deme y\u00f6ntemlerinde, d\u00fcnyadaki her i\u015flem, \u015firket ve devlet kurulu\u015flar\u0131n\u0131n sahip oldu\u011fu \u00f6zel olarak tutulan veritabanlar\u0131na kaydedilir.\u00a0Bu veritabanlar\u0131na halk taraf\u0131ndan eri\u015filemez ve bu nedenle kapal\u0131d\u0131r.\u00a0Halk da genellikle bir kurulu\u015fa ba\u011fl\u0131d\u0131r.\u00a0Bu tabiattan kaynakl\u0131 olarak, sahtekarl\u0131\u011fa veya bir a\u011fa zarar verebilecek bir sald\u0131r\u0131 taraf\u0131ndan zarar g\u00f6rmeye a\u00e7\u0131kt\u0131rlar.<\/p>\n

\u015eimdi g\u00fc\u00e7lendirilmi\u015f bir veri taban\u0131na sahip olan Blockchain zincirini d\u00fc\u015f\u00fcn\u00fcn.\u00a0Bitcoin’deki t\u00fcm i\u015flemleri kaydeder, tekrar \u00f6demelere izin vermez ve dijital paran\u0131n hareketini do\u011frulamak i\u00e7in birden fazla tarafa yani hissedara ihtiya\u00e7 duyar.<\/p>\n

Blockchain merkezi olmad\u0131\u011f\u0131ndan, ayn\u0131 zamanda bir k\u0131sm\u0131n\u0131n azalmas\u0131 durumunda, t\u00fcm a\u011f\u0131n daralmayaca\u011f\u0131 anlam\u0131na gelir.\u00a0Bitcoin a\u011f\u0131n\u0131n \u00e7al\u0131\u015fmas\u0131 i\u00e7in ihtiya\u00e7 duydu\u011fu bir \u00e7ok farkl\u0131 b\u00f6l\u00fcm\u00fc vard\u0131r.\u00a0\u00d6rne\u011fin, bir madenci eylemden \u00e7\u0131ksa bile, ticari i\u015flemler \u00e7al\u0131\u015fmaya devam etmeyi s\u00fcrd\u00fcrecektir.<\/p>\n

\u00a0<\/b>Eksileri:<\/b><\/p>\n

Bitcoin blok zinciri, merkezi olmayan bir a\u011f olarak tasarlanm\u0131\u015ft\u0131r.\u00a0Bununla birlikte bir tak\u0131m sorunlar da meydan gelmi\u015ftir.<\/p>\n

Bu b\u00fcy\u00fck sorun, a\u011f\u0131n daha s\u0131k\u0131\u015f\u0131k hale gelmesiyle birlikte Bitcoin’de ger\u00e7ekle\u015fen i\u015flem s\u00fcreleri ve maliyetlerin artmas\u0131d\u0131r.\u00a0Bu durum, sorunlar\u0131 ele almak i\u00e7in teknolojinin ilerleyen y\u0131llarda nas\u0131l geli\u015fmesi gerekti\u011fine dair, a\u011f\u0131 destekleyen bir dizi taraf\u0131n\/hissedar\u0131n anla\u015fmazl\u0131klar\u0131na yol a\u00e7m\u0131\u015ft\u0131r. \u00d6rne\u011fin, ge\u00e7en y\u0131l, Bitcoin’in gelece\u011fi konusunda ayn\u0131 fikirde olmayan bir grup geli\u015ftirici, altta yatan blok zincirini k\u0131rd\u0131 ve b\u00f6ld\u00fc. Bu nakit Bitcoin olarak bilinen bir Bitcoin yan \u00fcr\u00fcn\u00fc yarat\u0131lmas\u0131na yol a\u00e7t\u0131. Bu da \u00e7atallanma ad\u0131 verilen Bitcoin alt\u0131n\u0131 ile sonu\u00e7land\u0131. Ve bu \u00e7atallanmalar ise kendi problemlerini beraberinde getirdiler.<\/p>\n

Yarat\u0131lan bu yeni paralar genellikle daha az say\u0131da madencinin hakimiyetinde. Bir madenci, bir kripto para biriminin madencilik g\u00fcc\u00fcn\u00fcn yar\u0131s\u0131ndan fazlas\u0131n\u0131 kontrol ederse, potansiyel olarak blok zinciri \u00fczerinde sahtecilik yani tahrifat yapabilir. Ayn\u0131 zamanda Bitcoin blok zincirinde g\u00f6m\u00fcl\u00fc olan yasad\u0131\u015f\u0131 materyaller de Bitcoin’in bahsedilen ba\u015fka zararlar\u0131 konular\u0131 aras\u0131ndad\u0131r. Tek bir blo\u011fun, Bitcoin i\u015fleminin ge\u00e7mesi i\u00e7in gereken verileri i\u00e7erdi\u011fini biliyoruz. Ancak bu veriler i\u00e7inde ara\u015ft\u0131rmac\u0131lar, \u00e7ocuk pornografisi gibi baz\u0131 i\u00e7erik \u00f6rnekleri buldular. Bu standart g\u00f6r\u00fcnt\u00fc veya video dosyalar\u0131 yasal hale getirilmi\u015f Bitcoin verileriyle birlikte \u015fifrelendi\u011finden dolay\u0131 bu su\u00e7u i\u015fleyenleri yakalamak da ne yaz\u0131k ki olduk\u00e7a zorla\u015f\u0131yor\u2026<\/p>\n","protected":false},"excerpt":{"rendered":"

T\u00fcrk\u00e7e anlam\u0131yla blok zinciri olarak bilinen Blockchain teknolojisini k\u0131saca tan\u0131mlayacak olursak \u015fifrelenmi\u015f bir \u015fekilde veri y\u00f6netimi sa\u011flayan da\u011f\u0131n\u0131k yap\u0131da olu\u015fturulmu\u015f bir veritaban\u0131 sistemidir. Blockchain teknolojisinde her kullan\u0131c\u0131 a\u011fa, arada ba\u015fka bir arac\u0131 olmadan kolayca ba\u011flanabilir, yeni i\u015flemler ger\u00e7ekle\u015ftirebilir ve bloklar…<\/p>\n","protected":false},"author":3,"featured_media":1191,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1190","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-genel"],"yoast_head":"\nBlockchain Teknolojisi Nedir? - G\u00fczel Hosting Internet Hizmetleri - Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.guzel.net.tr\/blog\/genel\/blockchain-teknolojisi-nedir.html\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Blockchain Teknolojisi Nedir? - G\u00fczel Hosting Internet Hizmetleri - Blog\" \/>\n<meta property=\"og:description\" content=\"T\u00fcrk\u00e7e anlam\u0131yla blok zinciri olarak bilinen Blockchain teknolojisini k\u0131saca tan\u0131mlayacak olursak \u015fifrelenmi\u015f bir \u015fekilde veri y\u00f6netimi sa\u011flayan da\u011f\u0131n\u0131k yap\u0131da olu\u015fturulmu\u015f bir veritaban\u0131 sistemidir. 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