{"id":415,"date":"2012-07-24T12:56:41","date_gmt":"2012-07-24T12:56:41","guid":{"rendered":"http:\/\/www.karadenizli.biz\/yaren\/?p=415"},"modified":"2012-07-24T12:56:41","modified_gmt":"2012-07-24T12:56:41","slug":"bilgi-gizleme-teknikleri","status":"publish","type":"post","link":"https:\/\/www.karadenizli.biz\/yaren\/bilgi-gizleme-teknikleri\/","title":{"rendered":"Bilgi Gizleme Teknikleri"},"content":{"rendered":"<p>Bilginin gizlenmesi ve yaln\u0131zca istenilen ki\u015filer taraf\u0131ndan okunmas\u0131na izin verilmesi \u201csteganografi\u201d bilimi olarak adland\u0131r\u0131l\u0131r ve tarihten bug\u00fcne kadar \u00e7e\u015fitli ama\u00e7larla kullan\u0131lmaktad\u0131r. G\u00f6zle fark edilmeyecek say\u0131sal damgalar arac\u0131l\u0131\u011f\u0131 ile resim, ses ve video gibi \u00e7oklu ortam \u00fcr\u00fcnlerinin i\u00e7ine \u00fcr\u00fcnle ilgili ve \u00fcr\u00fcne \u00f6zel \u00e7e\u015fitli bilgiler yerle\u015ftirilebilmektedir. Burada ama\u00e7, bu \u00fcr\u00fcnlerin \u00e7o\u011falt\u0131lmas\u0131, da\u011f\u0131t\u0131lmas\u0131 gibi yasal olmayan davran\u0131\u015flar\u0131n \u00f6n\u00fcne ge\u00e7mektir.<\/p>\n<p>Steganografi gizli haberle\u015fme sanat\u0131na verilen add\u0131r. Yunanl\u0131 tarih\u00e7i Heredotos\u2019un bildirdi\u011fine g\u00f6re M.\u00d6 5.yy da Pers sald\u0131r\u0131s\u0131 s\u0131ras\u0131nda ,Yunan komutan Histiaeus, Susa Kral\u0131 Darius taraf\u0131ndan g\u00f6z hapsine al\u0131nd\u0131\u011f\u0131 s\u0131rada, Anadolu\u2019da bulunan Milet \u015fehrindeki damad\u0131 Aristagoras\u2019\u0131 durumdan haberdar etmek i\u00e7in&#8230;<!--more--><\/p>\n<p>ona gizli bir mesaj g\u00f6ndermek ister. Bu mesaj\u0131 Kral Darius\u2019un fark etmemeden Aristagoras\u2019a ula\u015ft\u0131rmak i\u00e7in bir k\u00f6lenin sa\u00e7\u0131n\u0131 kaz\u0131t\u0131r ve mesaj\u0131 k\u00f6lenin ba\u015f\u0131na d\u00f6vme olarakyazd\u0131r\u0131r. Sa\u00e7lar\u0131 uzayan k\u00f6le Anadolu\u2019ya g\u00f6nderilir.Aristagoras\u2019a ula\u015fan k\u00f6lenin sa\u00e7\u0131 tekrar kaz\u0131n\u0131r ve mesaj okunur. Tarihte tahta tabletlere mesaj kaz\u0131y\u0131p tabletin \u00fczerini mumla kaplamak ve daha sonra mumu eritmek, mor\u00f6tesi boya ile yazabilen kalemlerle mektup yazmak ve gizli mesaj\u0131 okumak i\u00e7in mektubu mor\u00f6tesi \u0131\u015f\u0131\u011fa tutmak, yaz\u0131l\u0131 bir metnin i\u00e7indeki baz\u0131 harfleri, \u00fczerlerine \u00e7ok k\u00fc\u00e7\u00fck bir delik delerek i\u015faretlemek, b\u00f6ylece o harflerden gizli bir mesaj olu\u015fturmak gibi y\u00f6ntemler kullan\u0131lm\u0131\u015ft\u0131r. Tarihtan bir \u00f6rnekte 2.D\u00fcnya sava\u015f\u0131 s\u0131ras\u0131nda Almanya\u2019n\u0131n mikronokta teknolojisi kullan\u0131larak geli\u015ftirdi\u011fi gizli haberle\u015fme teknolojisidir. Bu y\u00f6ntemde, gizli mesajlar\u0131n \u00e7e\u015fitli teknolojiler yard\u0131m\u0131yla nokta kadar k\u00fc\u00e7\u00fclt\u00fcl\u00fcp mektuplardaki s\u00f6zc\u00fcklerde bulunan noktal\u0131 harflerin ve noktalama i\u015faretlerinin \u00fczerine yap\u0131\u015ft\u0131rarak sakland\u0131\u011f\u0131 bilinmektedir. A\u015fa\u011f\u0131da, yine 2.D\u00fcnya Sava\u015f\u0131\u2019nda kullan\u0131lan ba\u015fka bir steganografi \u00f6rne\u011fi verilmi\u015ftir.<\/p>\n<p>\u201cApperently netural protest is thoroughly discounted and ignored.Isman hard hit.Blockade issue affects pretex for embargo on by-products,ejecting suets and vegetable oils\u201d<\/p>\n<p>Yukar\u0131da verilen paragrafta her kelimenin ikinci harfi yan yana getirildi\u011finde \u201cPershing sails from NY June 1\u201d c\u00fcmlesi yani\u201dF\u00fcze new York\u2019tan 1 Haziranda denize a\u00e7\u0131lacak\u201d mesaj\u0131 okunur.<\/p>\n<p>\u0130ngiltere ba\u015fbakan\u0131 Margaret Tahatcher\u2019in 1981 y\u0131l\u0131nda kabinesindeki bir bakan taraf\u0131ndan bas\u0131na baz\u0131 belgeler s\u0131zd\u0131r\u0131lmas\u0131ndan sonra, bu olay\u0131n sorumlusunun kim oldu\u011funu bulmak i\u00e7in her bakana verilen belgelerdeki yaz\u0131lar\u0131n bo\u015fluklar\u0131n\u0131 bakanlar\u0131 tan\u0131mlamak i\u00e7in \u00f6zel olarak ayarlatmas\u0131, b\u00f6ylece bakanlara i\u00e7eri\u011fi ayn\u0131 ama bi\u00e7imi farkl\u0131 yaz\u0131lar da\u011f\u0131t\u0131lmas\u0131, bu sayaede de bas\u0131na bilgileri veren bakan\u0131n yakalanmas\u0131 da ge\u00e7mi\u015ften verebilece\u011fimiz bir \u00f6rnektir.<\/p>\n<p>Kaynak: Bilim Teknik Dergisi Say\u0131 :507 sayfa 82,84<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bilginin gizlenmesi ve yaln\u0131zca istenilen ki\u015filer taraf\u0131ndan okunmas\u0131na izin verilmesi \u201csteganografi\u201d bilimi olarak adland\u0131r\u0131l\u0131r ve tarihten bug\u00fcne kadar \u00e7e\u015fitli ama\u00e7larla kullan\u0131lmaktad\u0131r. G\u00f6zle fark edilmeyecek say\u0131sal damgalar arac\u0131l\u0131\u011f\u0131 ile resim, ses ve video gibi \u00e7oklu ortam \u00fcr\u00fcnlerinin i\u00e7ine \u00fcr\u00fcnle ilgili ve \u00fcr\u00fcne \u00f6zel \u00e7e\u015fitli bilgiler yerle\u015ftirilebilmektedir. Burada ama\u00e7, bu \u00fcr\u00fcnlerin \u00e7o\u011falt\u0131lmas\u0131, da\u011f\u0131t\u0131lmas\u0131 gibi yasal olmayan davran\u0131\u015flar\u0131n [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5],"tags":[266,276],"class_list":["post-415","post","type-post","status-publish","format-standard","hentry","category-vaybee","tag-sifre","tag-steganografi"],"psp_head":"<title>Bilgi Gizleme Teknikleri \u2013 Orijinal Olan Her Bilgi...<\/title>\r\n<meta name=\"description\" content=\"Bilginin gizlenmesi ve yaln\u0131zca istenilen ki\u015filer taraf\u0131ndan okunmas\u0131na izin verilmesi \u201csteganografi\u201d bilimi olarak adland\u0131r\u0131l\u0131r ve tarihten bug\u00fcne kadar \u00e7e\u015fitli ama\u00e7larla kullan\u0131lmaktad\u0131r.\" \/>\r\n<meta name=\"robots\" content=\"index,follow\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.karadenizli.biz\/yaren\/bilgi-gizleme-teknikleri\/\" \/>\r\n","jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2X1Qf-6H","jetpack-related-posts":[{"id":6505,"url":"https:\/\/www.karadenizli.biz\/yaren\/psagor-kupasi\/","url_meta":{"origin":415,"position":0},"title":"Psagor Kupas\u0131","author":"karadenizli","date":"11 Kas\u0131m 2016","format":false,"excerpt":"\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00dcnl\u00fc matematik\u00e7i Psagorun icad\u0131 olan bu kupa\u00a0asl\u0131nda g\u00fcn\u00fcm\u00fcz insan\u0131na bir \u00e7ok mesajlar veriyor. Mesajlara ge\u00e7meden \u00f6nce kupan\u0131n \u00f6zelli\u011finden insan davran\u0131\u015flar\u0131yla ili\u015fkilendirerek k\u0131saca bahsedeyim. A kupas\u0131: \u00c7ok susad\u0131m su verir misiniz diyen insan. B kupas\u0131: Kupada su var ama neden C kupas\u0131ndaki kadar \u00e7ok olmas\u0131n? Kupada\u2026","rel":"","context":"&quot;\u0130lgin\u00e7 Bilgiler&quot; i\u00e7inde","block_context":{"text":"\u0130lgin\u00e7 Bilgiler","link":"https:\/\/www.karadenizli.biz\/yaren\/category\/vaybee\/"},"img":{"alt_text":"Pisagor-Kupasi-2","src":"https:\/\/i0.wp.com\/www.karadenizli.biz\/yaren\/wp-content\/uploads\/2016\/06\/Pisagor-Kupasi-2.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.karadenizli.biz\/yaren\/wp-content\/uploads\/2016\/06\/Pisagor-Kupasi-2.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.karadenizli.biz\/yaren\/wp-content\/uploads\/2016\/06\/Pisagor-Kupasi-2.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.karadenizli.biz\/yaren\/wp-content\/uploads\/2016\/06\/Pisagor-Kupasi-2.jpg?resize=700%2C400 2x"},"classes":[]},{"id":6521,"url":"https:\/\/www.karadenizli.biz\/yaren\/en-siradisi-vakalar\/","url_meta":{"origin":415,"position":1},"title":"En S\u0131rad\u0131\u015f\u0131 Vakalar","author":"karadenizli","date":"8 Eyl\u00fcl 2016","format":false,"excerpt":"Bu yaz okuma f\u0131rsat\u0131 buldu\u011fum \u201cBir Psikiyatristin Gizli Defteri\u201d daha \u00f6nce okumad\u0131\u011f\u0131m t\u00fcrden bir kitapt\u0131. Bu yaz\u0131mda kitapta ge\u00e7en ve ilgimi \u00e7eken b\u00f6l\u00fcmler hakk\u0131nda k\u0131saca bilgi verece\u011fim. Kitapta 15 farkl\u0131 s\u0131ra d\u0131\u015f\u0131 vaka anlat\u0131lmakta. Bu vakalar\u0131 okuduktan sonra bolca \u015f\u00fckretti\u011fimi de s\u00f6ylemeliyim. \u0130lgimi \u00c7eken Vakalar; - Elini bilerek devaml\u0131 k\u0131ran\u2026","rel":"","context":"&quot;Genel&quot; i\u00e7inde","block_context":{"text":"Genel","link":"https:\/\/www.karadenizli.biz\/yaren\/category\/genel\/"},"img":{"alt_text":"esdv1","src":"https:\/\/i0.wp.com\/www.karadenizli.biz\/yaren\/wp-content\/uploads\/2016\/09\/esdv1.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":424,"url":"https:\/\/www.karadenizli.biz\/yaren\/leonardo-da-vincinin-notlari-aynasiz-okunmaz\/","url_meta":{"origin":415,"position":2},"title":"Leonardo Da Vinci&#8217;nin Notlar\u0131","author":"karadenizli","date":"24 Ocak 2014","format":false,"excerpt":"Leonardo Da Vinci her zaman ve her zaman ilgimi \u00e7ekmi\u015ftir. E onunla ilgili ilgin\u00e7 bilgileri burada payla\u015fmamak olmaz tabi. Leonardo Da Vinci solakt\u0131. Sa\u011fdan sola do\u011fru yazmaya al\u0131\u015fm\u0131\u015ft\u0131. Bu y\u00fczden de notlar\u0131 yaln\u0131zca bir ayna yard\u0131m\u0131 ile okunabiliyordu. Kaynak: \u00a0Geo Dergisi\u00a0 2010 \u015eubat say\u0131s\u0131 Eki Geo Lino Dergisi Sayfa:34 El\u2026","rel":"","context":"&quot;\u0130lgin\u00e7 Bilgiler&quot; i\u00e7inde","block_context":{"text":"\u0130lgin\u00e7 Bilgiler","link":"https:\/\/www.karadenizli.biz\/yaren\/category\/vaybee\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/karadenizli.biz\/yaren\/wp-content\/uploads\/2012\/04\/Leonardo-Da-Vinci.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/karadenizli.biz\/yaren\/wp-content\/uploads\/2012\/04\/Leonardo-Da-Vinci.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/karadenizli.biz\/yaren\/wp-content\/uploads\/2012\/04\/Leonardo-Da-Vinci.png?resize=525%2C300 1.5x"},"classes":[]},{"id":298,"url":"https:\/\/www.karadenizli.biz\/yaren\/donunca-hacmi-artan-tek-bilesik-madde\/","url_meta":{"origin":415,"position":3},"title":"Donunca Hacmi Artan Tek Bile\u015fik Madde","author":"karadenizli","date":"5 Aral\u0131k 2013","format":false,"excerpt":"Suyun yo\u011funlu\u011fu 0,9998 gr\/cm3 iken, donmu\u015f suyun yani buzun yo\u011funlu\u011fu 0,919 gr\/cm3\u2019t\u00fcr. Di\u011fer s\u0131v\u0131lardan farkl\u0131 olarak suyun donmas\u0131 s\u0131ras\u0131nda birim hacimdeki yo\u011funlu\u011fu azal\u0131r ve hacmi de %8-9 oran\u0131nda artar. Bunun nedeni, normalde oksijen atomuna ba\u011fl\u0131 2 hidrojen atomu aras\u0131ndaki 104,5 \u00ba\u2019lik a\u00e7\u0131n\u0131n donma s\u0131ras\u0131nda alt\u0131gen \u015fekilli buz kristallerini olu\u015fturmak \u00fczere\u2026","rel":"","context":"&quot;\u0130lgin\u00e7 Bilgiler&quot; i\u00e7inde","block_context":{"text":"\u0130lgin\u00e7 Bilgiler","link":"https:\/\/www.karadenizli.biz\/yaren\/category\/vaybee\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4371,"url":"https:\/\/www.karadenizli.biz\/yaren\/kar-zarar\/","url_meta":{"origin":415,"position":4},"title":"K\u00e2r M\u0131, Zarar M\u0131? Yoksa&#8230;","author":"karadenizli","date":"4 Ocak 2015","format":false,"excerpt":"20 TL'ye ald\u0131\u011f\u0131n\u0131z bir \u00fcr\u00fcn\u00fc 21 TL'ye sat\u0131yorsunuz. Sonra ayn\u0131 \u00fcr\u00fcn\u00fc 25 TL'ye tekrar sat\u0131n al\u0131p, 26 TL'ye sat\u0131yorsunuz. Bu al\u0131\u015f veri\u015fler sonunda k\u00e2r m\u0131 ettiniz yoksa zarar m\u0131? \u00a0 20 TL'ye ald\u0131\u011f\u0131n\u0131z bir \u00fcr\u00fcn\u00fc 21 TL'ye satarsan\u0131z 21-20= 1 TL k\u00e2r edersiniz. Ayn\u0131 \u00fcr\u00fcn\u00fc 25 TL'ye tekrar al\u0131p 26\u2026","rel":"","context":"&quot;Ak\u0131l Oyunlar\u0131&quot; i\u00e7inde","block_context":{"text":"Ak\u0131l Oyunlar\u0131","link":"https:\/\/www.karadenizli.biz\/yaren\/category\/zekasorulari\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":6243,"url":"https:\/\/www.karadenizli.biz\/yaren\/matematikle-ilgili-animasyonlar\/","url_meta":{"origin":415,"position":5},"title":"Matematikle \u0130lgili Animasyonlar","author":"karadenizli","date":"14 Kas\u0131m 2015","format":false,"excerpt":"Bu sayfada sizlere zaman zaman ara\u015ft\u0131rma yaparken ba\u015fta Wikipedi olmak \u00fczere internet sitelerinde rastlad\u0131\u011f\u0131m ve matematikle ilgili olan konular\u0131n a\u00e7\u0131kland\u0131\u011f\u0131 animasyonlar\u0131 ve a\u00e7\u0131klay\u0131c\u0131 bilgileri payla\u015faca\u011f\u0131m. Asal Say\u0131 : Yaln\u0131zca 1'e ve kendine b\u00f6l\u00fcnen say\u0131lara asal say\u0131 denir.\u00a0Ba\u015fka bir ifade ile asal say\u0131lar, sadece iki pozitif tamsay\u0131 b\u00f6leni olan do\u011fal say\u0131lard\u0131r.\u2026","rel":"","context":"&quot;E\u011flenceli Matematik&quot; i\u00e7inde","block_context":{"text":"E\u011flenceli Matematik","link":"https:\/\/www.karadenizli.biz\/yaren\/category\/ogrenciler-icin\/eglenceli-matematik\/"},"img":{"alt_text":"Animation_Sieve_of_Eratosth","src":"https:\/\/i0.wp.com\/www.karadenizli.biz\/yaren\/wp-content\/uploads\/2015\/10\/Animation_Sieve_of_Eratosth.gif?resize=350%2C200","width":350,"height":200},"classes":[]}],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.karadenizli.biz\/yaren\/wp-json\/wp\/v2\/posts\/415","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.karadenizli.biz\/yaren\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.karadenizli.biz\/yaren\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.karadenizli.biz\/yaren\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.karadenizli.biz\/yaren\/wp-json\/wp\/v2\/comments?post=415"}],"version-history":[{"count":0,"href":"https:\/\/www.karadenizli.biz\/yaren\/wp-json\/wp\/v2\/posts\/415\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.karadenizli.biz\/yaren\/wp-json\/wp\/v2\/media?parent=415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.karadenizli.biz\/yaren\/wp-json\/wp\/v2\/categories?post=415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.karadenizli.biz\/yaren\/wp-json\/wp\/v2\/tags?post=415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}