Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
19-bilet
1. DES-malumotlarni shifrlash standartini tushuntiring
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=229, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={269,356,252,356,346,808,299,4,732,356,148,808,285}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=773, g=668, x=427, a=572, b={673,40,43,113,603,603,606,320,323,390,393,250,393,320,323,390,393,250,393,320,323,43,606}, M=?
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