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RoundKey Üretimi Yukarıda analtılan kısımda 16 adet RoundKey ‘ in nasıl üretildiğinden bahsetmedik. Şimdi bu keyler nasıl üretilir onu açıklayalım. Key üretiminin işleyişi aşağıdaki resimde gösterilmiştir :Burada 64-bitlik değer 56-bite …
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DES ile Veri Şifreleme -3
DES ile veri güvenliğini sağlama yönteminde DES in önemli bir aşamasına geldim.Bu aşamada ise 16 round un her birinin nasıl gerçeklendiği verilecektir.Aşağıda bunun tablosu verilmiştir.
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DES ile Veri Şifreleme -2
DES şifreleme algoritmasının iç yapısına inersek aşağıda verilen şekil karşımıza çıkacaktır.Bu tablodan DES simetrik şifreleme algoritmasının yapısını daha iyi kavramış olacaksınız..!!
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DES ile Veri Şifreleme -1
Şifreleme gönderilecek bir mesajın gizliliğini başkalarından sakındırmak için kullanılan bir yöntemdir. Şifreleme çeşitlerinden biri olan simetrik şifrelemede amaç veriyi yollayan ile veriyi alan aynı anahtar üzerinde ve aynı şifreleme algoritması …
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