Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
20-bilet
1. GOST 28147-89 - ma’lumotlarni shifrlashning Rossiya standarti algoritmini tushuntiring
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=191, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={668,524,175,524,61,73,524,73,171,732,391,296,391,524}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=523, g=47, x=190, a=490, b={247,132,351,373,373,477,247,80,143,373,69,477,80,132,351,488}, M=?
Kafedra mudiri Jo'rayev G.U.